Police have launched a manhunt after a young boy reported he was sexually assaulted in his own bedroom by an intruder.
The attack is said to have happened just after midnight on Saturday at a residential address in Ickenham, Hillingdon.
Officers said there was no sign of forced entry, but said it was reported a man had entered the home and sexually assaulted the child in his room.
The suspect then fled the scene after the child told him he would call the police, detectives said.
The boy, whose age has not been released, is being supported by specially trained officers.
Police released a CCTV still of a man they would like to trace in connection with the incident, urging anyone who recognises him to call police.
The suspect is described as white, of slim build with short hair and a beard. He was wearing blue jeans and a t-shirt.
No arrests have been made.
Detective Constable Claire Field, from the West Area Command Unit’s Safeguarding team, said: “This matter has clearly caused a great deal of anguish to the boy’s family.
“Police are very concerned and we are carrying out an extensive and well-resourced investigation.
"We are appealing for the public’s help to identify a man who was seen running from the area shortly after the assault. It is vital that we speak to him to establish why he was in the vicinity.
“Whilst incidents such as this are thankfully very rare, I would encourage people to ensure that their homes are kept secure at all times and to report anyone acting suspiciously.”
Detective Chief Inspector Natalie Norris from the West Area Command Unit, said: “We fully recognise how concerned our community will be after an incident like this.
“For this reason we have patrols in the area and we are working with partners and keeping them informed. Together we are doing all we can to support the family and all those affected.”
"This is a horrible incident and thankfully rare, but my officers are working incredibly hard to find the person responsible.”
Anyone who recognises the man in the CCTV image, or who was in the area at the time, is asked to call police on 101 or contact via Twitter @MetCC. Please quote CAD 145/23NOV.
