A teenage boy missing from his London home is thought to be in Italy after getting the Eurostar to Paris, police said.

Rahul Khan, 14, left his home in Harrow on Thursday night and was spotted on CCTV getting on an international train service from St Pancras that evening, Scotland Yard said.

Officers believe he has now made his way from France to Italy.

A Metropolitan Police spokesman said: "It is thought he was travelling alone. Rahul has not been reported missing to police before."

Rahul is described as 5ft 7in, with a slim build and a distinctive scar on his right cheek.

He was wearing a light-grey hooded top with white drawstrings over a dark-coloured top and carrying a dark-coloured rucksack when he was last seen.