The mother of Westminster terrorist Khalid Masood has said she is "deeply shocked, saddened and numbed" by the actions of her son.

A 30-year-old man has been arrested in Birmingham by officers investigating the Westminster terror attack in London.

Counter-terrorism police have been searching a home in Birmingham where friends of Westminster attacker Khalid Masood lived.

Security at UK Parliament's gates was breached last year by an intruder who flashed fake identification and wandered around the estate for 12 hours, it has been claimed.

The "selfless bravery" of the policeman killed in the Westminster terror attack has been hailed by his family, who thanked those who fought to save his life.

Fears Westminster terrorist Khalid Masood was groomed for extremism in prison have heightened after it was claimed he turned to Islam behind bars.

Khalid Masood who killed four people during a terror rampage in London had made three trips to Saudi Arabia, the country's embassy in Britain confirmed.

A fundraising page for a Westminster terror attack victim has been taken over by JustGiving amid fears it was set up by a fraudster.

Counter-terrorism detectives are attempting to trace any associates of Khalid Masood as they mount a huge investigation to establish what triggered the terrorist's murderous rampage in Westminster.

Here is what we know about the victims of the Westminster attack.

The Romanian woman who fell from London's Westminster Bridge into the River Thames during the terrorist attack was due to receive a marriage proposal later that day.

An American tourist has shared a photo of herself with Pc Keith Palmer outside Parliament.

The widow of a man slashed in the face by Khalid Masood told how she felt "sick" after hearing he went on to commit the atrocity in Westminster.

Enda Kenny has signed a book of condolence for the victims of Wednesday's Westminster terror attack.

Masood was jailed for two years over the 2000 attack.

The fifth person to be killed in the Westminster terror attack was pensioner Leslie Rhodes.

"I have heard nothing that suggests to me that it would have been possible to stop it."

Garda HQ will conduct a fresh review of security strategies after the London terrorist attack and are monitoring the reaction of a small number of jihadist sympathisers here.

Latest: Two more "significant arrests" have been made in connection with the Westminster attack, police have said.

Garda HQ will conduct a fresh review of security strategies after the London terrorist attack and are monitoring the reaction of a small number of jihadist sympathisers here.

Islamic leaders in Ireland have expressed fears that the terrorist attack in London will be blamed on Islam and fuel division and hatred in society.

Defiance and quiet dignity were shown at a vigil to the victims of the Westminster attack, hours before police said a 75-year-old man had died from injuries sustained in Wednesday's outrage.

Victims of the Westminster terror attack are being treated in hospitals across the capital, though some who were admitted have now been discharged.

Latest: A 75-year-old man who was injured in the Westminster terror attack has died in hospital, Scotland Yard said.

Searches are continuing at a flat and a house in Birmingham following police raids linked to the Westminster terror attack.

Pc Keith Palmer was a "wonderful dad and husband, a loving son, brother and uncle" who will be "deeply missed", his family said.

"I could see in front of my eyes the police man shouting 'he's down there!', so I knew immediately that it was a terrorist attack"

The League One club have revealed Palmer was a long-standing season-ticket holder at The Valley.

"…If you open your door to uncontrolled immigration from Middle Eastern countries, you are inviting in terrorism."

Latest: The man police believe to be behind the terrorist attack in Westminster has been formally identified as 52-year-old Khalid Masood.

Latest: The injuries suffered by an Irish person in the Westminster terror attack are not life threatening, the Government has been told.

As investigators piece together the background to the Westminster terror attack, the picture beginning to emerge appears to bear the hallmarks of a "lone wolf" strike.

World leaders have condemned the bloody terror attack outside the British Houses of Parliament that ended in the deaths of four people and left up to 40 injured.

Latest: Four people were killed in the attack in Westminster yesterday. These were: Aysha Frade, 43; a man in his mid 50s, PC Keith Palmer and the attacker.

IN the fullness of time, the motivation behind yesterday’s attack on London will become clearer. What is already clear, however, is that the democracy and freedoms we often take for granted are fragile flowers that require nurturing.

Mr Trump Jr posted the link along with the caption “You have to be kidding me?! Terror attacks are part of living in the big city, says London Mayor Sadiq Khan.”

Security has been beefed up in Los Angeles as a "precaution" in the wake of the Westminster terror attack which left four dead, the city's mayor has said.

The Metropolitan Police officer who died in the Westminster attack joins a long list of colleagues who have been killed in the line of duty.

People across the world have taken to social media to express their support for the people of London, following the terror attack which occurred earlier today.

Mr Ellwood, who himself is a retired soldier, is reported to have performed CPR on the wounded officer, performing mouth-to-mouth and applying pressure to his stab wounds.

Update 8.15pm: Responding to today's attack in London, President Michael D. Higgins expressed the sympathy of the Irish people with the families of those who have lost their lives and to those who have been injured, resulting from the terrible attack in Westminster.

Young British boxers have told of their shock and horror after witnessing the violent attack outside the Palace of Westminster.

British politicians described chaotic scenes in Westminster after a security alert meant many had to be evacuated from the UK Parliament.

Radoslaw Sikorski posted a video to Twitter purporting to show people lying injured in the road on Westminster Bridge.