Police have released a new image of a man wanted for questioning after a young boy reported he was sexually assaulted in his bedroom by an intruder.
Officers were called to a residential address on The Greenway in Ickenham, Hillingdon, London, soon after midnight on Saturday after reports a man had gained entry to a property.
The Metropolitan Police said there was no sign of forced entry, but that the man had entered the child's bedroom and sexually assaulted him.
The suspect then fled the scene after the young boy told him he would phone the police, detectives said.
Police previously released a black-and-white image of a man, but have now issued a colour photo taken at a local underground station.
The suspect is described as white, of slim build with short hair and a beard. He was wearing blue jeans and a T-shirt.
The boy, whose age has not been given to protect his identity, is being supported by specially trained officers.
Police have asked anyone who recognises the man, or who was in the area at the time, to contact them.
Detective Sergeant David Baldwin, from the West Area Command Unit's Safeguarding team, said: "We are yet to identify a man we would like to speak to and so hope releasing this further image may help progress enquiries.
"We know the suspect got on an E7 bus prior to the incident before he then boarded an underground train.”
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 them via Twitter @MetCC, quoting case number CAD 145/23NOV.