Khaled Omeed, 30, has been visiting London with his family since 10 July, staying in Hounslow. He became separated from his family on the Jubilee Line platform of Baker Street tube station at around 6pm on Friday, 12 July, and has not been seen since.

Officers are concerned as Khaled has a learning disability and is non-verbal. He is not familiar with London.

The family, who live in Toronto, were due to fly home today, but have remained in London as efforts to locate Khaled continue.

Anyone who may have seen Khaled is asked to call 101, quoting reference 672/13jul. For an immediate sighting, please dial 999.