Police want to speak to a man who approached Hannah in the street
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Police hunting the killer of teenager Hannah Foster have stopped hundreds of drivers overnight in the street where her body was found.
More than 2,500 people have been questioned by 100 officers making checks in Southampton and Southsea, near Portsmouth.
Hannah, 17, was discovered in undergrowth in Allington Lane, in the West End area of Southampton, last Sunday.
The A-level student, who had won a place to study medicine at university, had been strangled.
Detective Inspector Tony Adams said on Saturday: "We have received a number of new lines of inquiry and are pleased."
Police questioned motorists at both ends of Allington Road between midnight on Friday and 0830 GMT on Saturday.
They also stopped drivers near the Granada Road roundabout in Southsea, between 0600 and 0900 GMT on Saturday.
Police believe Hannah's mobile phone and satchel, which were found in a tip in Portsmouth, were thrown into a bottle bank near the roundabout, on Waverley Road.
On Friday evening pedestrians and drivers were questioned in Portswood Road and Highfield Lane, Southampton.
Officers are also making house to house enquiries, police say.
A witness has reported hearing screams on the night Hannah is believed to have been abducted.
The 63-year-old woman has told Hampshire Police she heard the screams minutes after Hannah was last seen on 14 March.
She said the noise came from the corner of Richmond Gardens and Grosvenor Road, the street where Hannah lived.
Hannah saw a female friend onto a bus nearby at 2250 GMT on the night she disappeared.
Ten minutes later she called 999 from her mobile, but only muted noises were heard during the two minute call.
Police want to trace the driver of a dumper truck, and two taxi drivers seen near the scene last Saturday.
A man was questioned on Wednesday afternoon in Southampton but later released.
Detectives are also looking for an Asian man, who approached Hannah twice in the past two months close to her home and called her by her name.