(Pittsburgh, Pa.) Authorities say a 15-year-old Marquis Campbell died at a Pittsburgh hospital after two people fired into a van that he was sitting in at Oliver Citywide Academy . Pittsburgh Public Schools said the male student was shot in the school van at dismissal time yesterday afternoon. No arrests have been made and witnesses say tht two masked men approached the van and ran off after the shooting. Police say they are reviewing surveillance videos and seeking witnesses. School officials say all other students were safe inside the building. The school was locked down for a time. Students will learn remotley for the remainder of the week.