Police offered a �5,000 reward for information about a missing teenager today - three months after she was last seen.

Alisa Dmitrijeva, 17, has not been seen since shortly after midnight on August 31 in Friars Street, King's Lynn.

Today police said the �5,000 reward money would be divided between people who provide relevant information which helps them trace her.

Det Chief Insp Melanie Dales, of cambridgeshire police, said: 'As the weeks go on we are becoming more and more concerned about Alisa.

'I hope this reward will motivate someone with information about Alisa's whereabouts to contact us.

'Any information, no matter how small, could provide that vital clue to trace her.'

Officers say there have been unconfirmed sightings of Alisa in recent weeks but she has not made contact with any family or friends.

She is described as 5'6'', with collar-length dark brown hair with blonde highlights. However her hair may now be darker with a fringe.

Anyone with any information about Alisa's whereabouts should call police on 101 or Crimestoppers, anonymously, on 0800 555111.