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5 December 2011, 12:40 | Updated: 5 December 2011, 12:50
Police searching for a missing Wisbech teenager are using Facebook to try and find her.
Alisa Dmitrijeva, who is 17 and originally from Latvia, was last seen in King's Lynn on the 31st August.
According to Police, she has not contacted her family, accessed her bank account or used her phone since.
Now, detectives have placed an advert on social networking site Facebook, aimed at her friends and people who may have seen her.
It is targeted at Facebook users who say they live in Wisbech, Norfolk and Lincolnshire and has been translated into Latvian and Lithuanian as well as English.
When people click on the advert, it takes them through to a page containing contact details for Cambridgeshire Police.
Last week, police put up a £5,000 reward for anybody with information that helps them find Alisa.
Officers have also been putting up posters containing Alisa's picture on Wisbech, Peterborough, Kings Lynn and Lincoln.
Detective Chief Inspector Melanie Dales said: "We know Alisa used social media so this advert will target people who may have information about her whereabouts.
By translating the advert we hope to reach members of the community who know Alisa but may not have seen the appeals in traditional media.
It’s been several months since anyone saw or heard from her and we are becoming increasingly concerned for her safety.
I would urge anyone with information about her whereabouts to contact police."
Anyone with information is asked to contact police on 101 or Crimestoppers, anonymously, on 0800 555 111.