1,500 drivers quizzed over Shannon

The motorists were questioned by police carrying out a massive information seek in Dewsbury, West Yorkshire, on Tuesday afternoon.

Officers carried out the operation exactly a week after the nine-year-old failed to return to her home in Moorside Road, Dewsbury Moor, West Yorkshire, after school.

Detectives have conceded Shannon "may have fallen into the wrong hands".

The incident room has also received more than 500 calls in the search for Shannon.

As the investigation enters its second week, officers will visit more than 2,000 houses in the Dewsbury area as part of the continuing search for the little girl.

On Tuesday, Det Insp Andy Brennan, who is leading the investigation, told reporters: "What concerns me greatly at this point is that Shannon is a vulnerable nine-year-old who may have fallen into the wrong hands."

Mr Brennan said he believed the key to Shannon's disappearance lay in the local area and police spoke to drivers at five locations near to the place where Shannon was last seen.

Mr Brennan appealed to anyone who was in the Dewsbury Moor area on February 19 to think back to anything unusual they saw that day, or had seen since.

Specialist search dogs that have been trained to sniff out human remains have been used in the investigation, Mr Brennan added.