A suicide bomber rammed his explosives-filled van into the gates of a school in northwestern Pakistan Wednesday, killing at least three paramilitary soldiers, police said. The school, at Subhan Khaur village in Charsadda district, was not occupied by any children but was being used by security forces battling Taliban militants in the region, police official Marjan Ali said. "At least three paramilitary soldiers have been killed in the suicide attack," Ali said."It was a large vehicle. Body parts of the suicide bomber and the wreckage of the vehicle was scattered on the site," Ali said, adding that security forces have cordoned off the area.