British police in Cambridgeshire, north of London, have renewed their appeal for information about a missing 17-year-old girl who was born in Latvia.

After several reported sightings of Alisa Dmitrijeva in the Wisbech area, police investigating her disappearance are again asking the public for help. A family member reported her missing on Sept. 6, but she was last seen shortly after midnight Aug. 31 on Friars Street in King’s Lynn.

The area from which Dmitrijeva went missing is about 100 miles (160 kilometers) north of London. Besides Wisbech, she has ties to Peterborough, Lincon and King’s Lynn, according to a Sept. 23 press release from Cambridgeshire Constabulary.

“We have had a couple of potential sightings of Alisa in Wisbech and we are really keen to get those confirmed,” said Det. Chief Inspector Melanie Dales. “Her friends and family are very worried as they have not seen or heard from her for three weeks. I would urge anyone who has seen Alisa since August 31 to contact police.”

Dmitrijeva is described as 5 feet, 6 inches tall (1.67 meters), with collar length dark brown hair with blonde highlights. However, her hair may now be darker with a fringe.

Persons with information about Dmitrijeva’s whereabouts may telephone Cambridgeshire police at +44 0345 456 456 4 or, anonymously in the United Kingdom, through Crimestoppers on 0800 555 111.