Update 5.15pm: The family of a mother-of-two who posted a harrowing video from the top of Grenfell Tower say they are still waiting for news.
Rania Ibrahim and her two daughters, Fathia, five, and Hania, three, have not been seen since the fire.
The 30-year-old was seen in footage on Facebook Live desperately seeking help in the smoke-filled corridor before going out to a balcony.
A woman is heard shouting down to the street that they are stuck on the 23rd floor.
Family member Ali Ahmed said: "My brother hasn't seen his wife and two daughters.
"No-one has seen them - we just came back from the hospital.
"They were on the 19th floor, it's too high.
"We have been everywhere but there's no information.
"She made a Facebook video saying they have been advised to stay inside and couldn't get out."
He added: "Others have got missing people but there's no information.
"We're waiting for any news or anything but there's nothing.
"It's sad, very sad. No one can give us any information about a whole family, kids or nothing."
Friend Rahmana Rashid posted a picture of her and the young girls on Facebook, saying: "Rania Ibrham my friend is missing from the grenfill tower, if you have seen her or have any news on her pls contact me."
Update 3.55pm: The lawyer for the family of Gloria Trevisan, an Italian architecture graduate missing after the Grenfell Tower fire, has told Italian media there is "no hope" of finding her or her partner Marco Gottardi alive.
Friends and relatives of the couple have been appealing for information after Ms Trevisan called her mother from the tower block in the early hours of Wednesday morning.
"I've heard the recording of Gloria talking to her mother and there is no hope to find them alive," said the lawyer, Maria Cristina Sandrin, in a filmed interview with Italian press.
Ms Trevisan reportedly called her mother at 3am, saying a fire had broken out in the building and they were waiting for help.
"They wanted to go down but said they could see the flames going up the stairs and the smoke was more and more intense," Loris Trevisan, Gloria's father, told local newspaper Il Mattino di Padova.
The line was disconnected shortly afterwards, Mr Trevisan said, and "hundreds" of attempts to get back in touch have come to nothing.
Giannino Gottardi, father of Marco, told Il Mattino his son called at 3.45 am, then again just after 4am.
Mr Gottardi said: "In the first call Marco told us not to worry, that everything was under control, that basically we must not worry.
"He was trying to minimise what happened, probably not to unsettle us.
"But in the second call, and I can't get this out of my head, he said there was smoke, that so much smoke was rising."
Ms Trevisan, who completed her master's degree in architecture at the University of Venice last October, had travelled to London with Mr Gottardi to find work, according to Mrs Sandrin.
The couple recently moved into their apartment on the 23rd floor of the Grenfell Tower, which went up in flames on Wednesday morning.
Emergency services have so far searched up to the 20th floor, but concerns over the structural integrity of the tower block have forced firefighters to suspend full searches for the time being.
"She said goodbye," said Mrs Sandrin of Gloria's phone call to her parents. "She said 'thank you mother for what you have done for me'."
She asked journalists to give the family privacy, as "we don't know in what condition we will find the bodies, [or even] if we will find the bodies".
"The first thought for the family is to bring them back home," she added.
Earlier: A number of people have been reported missing following the Grenfell Tower fire in London.
:: Khadija Saye
Artist Khadija Saye, 24, who is currently showing her artwork in the Venice Biennale, was in her flat on the 20th floor, with her mother Mary Mendy, who is thought to be in her 50s.
Her friend, artist Nicola Green, said: "We're desperately trying to communicate with all the hospitals.
"We're told some people have been rescued up to the 19th and 20th floor. She was on the 20th floor. Nobody has any information at this point."
Ms Green told the Press Association that Ms Saye was last heard from at 3am when she was direct messaging from her flat, as her phone was not working.
Ms Green's husband, Labour MP David Lammy, also put out a plea to find Ms Saye, tweeting: "If you have any information about Khadija Saye pls contact me. She is our dear friend, a beautiful soul and emerging artist."
:: Jessica Urbano
Twelve-year-old Jessica Urbano is still missing following the fire at the block.
Ana Ospina posted an image of the young girl, said to be about 5ft tall, on Facebook, saying: "Please continue to share the photo of my niece who has not yet found her. I know there are people who say they already found her, but the reality is that there has been no news of her."
Mrs Ospina told the Press Association the young girl lived on the 20th floor, adding: "She last spoke to her mum when she borrowed a phone and told her she was on the stairs with other people.
"We than have had unconfirmed reports/sightings of her outside of the flats and also being put into an ambulance, but we have checked hospitals and no news."
:: Gloria Trevisan and Marco Gottardi
The young Italian couple recently moved into the 23rd floor of Grenfell Tower.
Friends and family have appealed for information online after last hearing from the couple early on Wednesday morning.
"I don't have no news from them since last night and their mobile phones are off," Mr Gottardi's cousin wrote on Facebook. "I'm praying God they make it out safely."
Ms Trevisan, 26, called her mother in Italy at roughly 3.30am on Wednesday to say their building was ablaze, according to the Italian newspaper Corriere del Veneto. They have not been heard from since.
:: Mariem Elgwahry
Emma Evans shared an appeal to find long-time friend Mariem Elgwahry, who lived on the 19th floor of the tower block and was said to be missing with her mother.
Ms Evans told the Press Association that Ms Elgwahry had last been heard from when she spoke to another friend in the tower block - who was since confirmed safe - at around 2.30am.
She added that she had been to a number of rescue centres in the area "with no luck yet".
:: Ali Yawar Jafari
Ali Yawar Jafari, 82, is thought to be among those missing.
His son, Hamid Ali Jafari, said his father had lost contact with his mother and sister, who lived with him in Grenfell Tower, on the 10th floor.
The younger Mr Jafari told the Press Association he had been to several rescue centres throughout the day since first reporting his father missing on Twitter just before 8am.
Asked if he had any news since then, he said: "No."
According to the Telegraph, Mr Jafari said: "He was with my mother and sister in the lift and she said the lift stopped on the tenth floor and he said there was too much smoke and he couldn't breathe and he got out of the lift and then the doors shut and it didn't stop again till the ground floor."
:: Raymond "Moses" Bernard
A family friend confirmed to the Press Association that Raymond Bernard, known to friends as Moses, remained missing after the fire.
:: Rania Ibrham
Believed to be a mother of two small children, Rania Ibrham, 30, uploaded a harrowing Facebook Live video as she appeared to be stuck at the top of the tower block, and has not been heard from by friends since.
In the footage, she can be seen seeking help in the smoke-covered corridor of the block before going back into her home and looking down on the street below from her balcony.
Friend Rahmana Rashid posted a picture of her and two young girls on Facebook saying: "Rania Ibrham my friend is missing from the grenfill tower, if you have seen her or have any news on her pls contact me."
Another friend, named only as Maseen, told the MailOnline: "My friend, Ranya Ibrahim, lives on the top floor with her two children who are just three and five years old."
"I received a Snapchat video from Ranya at 3am just after the fire started and I haven't heard from her since," she added.
"She lives on the top floor and her husband was not home because he is on holiday."
:: Hesham Rahman
Noha Baghdady shared a picture of her brother Hesham Rahman, 57, across a number of platforms, saying he lived on the 20th floor of the tower block and had not heard any news since the fire broke out.
She said her nephews were "currently searching hospitals" and added: "I'm feeling so helpless all we can do is pray he is safe and well."
According to Sky News, Mr Rahman's last contact with his family was at around 3am when he told them he could smell smoke.
It was also reported that Mr Rahman has diabetes, making it difficult for him to walk down stairs.
:: Dennis Murphy
Stevan Racz shared a post seeking information about his uncle Dennis Murphy, whom he said had called while trapped on the 14th floor of the building.
"We haven't heard anything since. Can anyone with any information contact me please," he said.
One commenter on another post seeking Mr Murphy wrote: "I've been around asking everyone, going to the centres, no one's seen him."
:: Mohamed Neda
A friend of missing Mohamed Neda, Ariana Neumann Rodger, posted on Facebook that "his family are severely injured and in hospital and desperate to find out where he is".
Zia Popal, who described Mr Neda as his uncle, also posted on the social network and said: "He was on the top floor of the building trying to help (people) and went missing since.
"If anyone has links with emergency services please take a look at his photos and pass them on just in case anyone has spotted him.
"We have already been to all (the five) major hospitals but they do not have him registered."
:: Anthony Disson
Known as Tony, the 66-year-old is reported to have last been in contact with his family at around 3am while he was inside the building.
Lee Disson, Tony's son, posted an appeal for information on Facebook and said he was "still praying for him".
The appeal read: "If anyone has seen my Dad, Tony Disson could they let us know. My heart goes out to all the people at Grenfell Tower."
He is reported to have lived on the 10th floor and Sky News said his wife Cordelia and three sons have been searching for him in hospitals.
:: Abdulaziz Wahabi, wife Faouzia and children Nurhouda, Yassin and Medhi
All five lived on the 21st floor of the tower, according to Mr Wahabi's sister.
Hana Wahabi told reporters: "I rang him and the fire had not reached the top of the block at that point.
"He said he had been told to stay inside, stay in one room together and put towels under the door.
"I told him to leave. He said he was going to come. Then I called him and he said there was too much smoke.
"The last time I saw him they were waving out the window. The last time I spoke to his wife, he was on the phone to the fire brigade."
:: Mohamednur Tuccu
Mr Tuccu is missing along with his wife Amalahmedin and his three-year-old daughter after visiting relatives in Grenfell Tower, his employer said.
Mr Tuccu's manager, chief executive of Red Consultancy Mike Morgan, told Sky News: "Mo is a part of the family. He will have been with us for 10 years next month and is due to be awarded his decade milestone. We all just want to hear that he is OK."