Police are searching for a rapist who attacked an elderly woman in her home.
The woman, in her seventies, opened the door to her home in Purley, south London, at 7.50am on Wednesday after becoming aware of a man on her doorstep.
After she opened the door, the man wedged it with his foot and entered the property where he assaulted and raped her, the Metropolitan Police said.
The woman described the suspect as a 5ft 8in white man with short brown hair.
He is believed to have a Scottish accent and a tattoo or mark on his neck, and a circular tattoo on the left side of his chest.
Specially trained detectives are supporting the woman while she helps with the investigation, officers said.
Detective Inspector Keith Ward, from the Metropolitan Police's Sexual Offences, Exploitation and Child Abuse Command, said detectives were working around the clock carrying out door-to-door inquiries, gathering CCTV and speaking to anyone in the area at the time to identify the man.
"We are totally alive to the fact that an incident like this will cause alarm to people living in the area, and I would like to provide as much reassurance as I can that detectives are doing everything we can to arrest the suspect," he said.
"We ask that anyone who recognises the suspect's description contacts us as a matter of urgency. For anyone worried about doing this, I would reassure them that they will be treated with the utmost sensitivity and there are ways and means that innocent people put to us can be eliminated from our inquiries."
Anyone with information should call the police on 020 8721 4106 or contact Crimestoppers anonymously on 0800 555 111.