The family of a missing 16-year-old boy from Peterborough have spoken of their devastation and concern over his disappearance.
Theo Kawala was dropped off in the city centre by his father at 1930 GMT on Friday.
He was last seen on CCTV in Bridge Street on his own outside the old Woolworths building at about midnight, heading towards Town Bridge.
In a statement, the family appealed for anyone with information to call police.
'Out of character'
"We are devastated, anxious and very concerned about Theo's disappearance and we just want to see him back home," they said.
A major police search is taking place in and around the city centre and the river bank.
Insp Richard Isley, of Cambridgeshire Police, said: "This is completely out of character for Theo and his family are very worried about him.
"At this stage there is nothing to suggest that Theo has been the victim of a crime but we are extremely keen to trace him as soon as possible.
"I would like to hear from anyone who has seen Theo since Friday or may have information about his whereabouts.
"I would also appeal to Theo directly that he is not in any trouble and should contact his family or the police as soon as possible."