Jeshma was stabbed a week after she went missing

Jeshma Raithatha, 17, of west London, was an avid user of new technology but police say at this stage there is no evidence she had online relationships.

Her body was discovered in bushes near her home, in Sudbury Hill, on Tuesday.

Police say Jeshma may have been kidnapped. Her body was found eight days after she was reported missing.

Buildings and garages in the area where her body was found are being searched for evidence of her being held against her will.

It is crucial to the inquiry that we find out where Jeshma was from when she was last seen until the time her body was found Det Supt Sue Hill

The last reported sighting of Jeshma was at Claremont High School in Kenton, north-west London, on 16 May, but tests show she died on 22 May from stab wounds to the heart.

Police are also considering whether the teenager, who would have turned 18 last Thursday, may have stayed with a friend or boyfriend who was not known to the family.

Phone and text messages and internet records are being examined in an attempt to unearth a motive.

Jeshma's partially naked body was found at the back of a leisure centre near to her home but a post-mortem examination found no obvious signs she was sexually assaulted.

Det Supt Sue Hill, who is leading the murder inquiry, said it was likely the teenager was killed elsewhere before her body was dumped at the site.

'A strong, fit girl'

She said: "It is crucial to the inquiry that we find out where Jeshma was, from when she was last seen until the time her body was found on Tuesday morning.

"We need to know why her body was discovered in an area so familiar to her and so close to her family.

"She was a strong, fit girl and it's very difficult to keep a teenager locked up without somebody knowing."