Gaza's Hamas rulers say gunmen abducted four Palestinians in neighboring Sinai after intercepting a bus bound for Cairo airport. The Hamas interior ministry said the Palestinian travelers had crossed from Gaza into Egypt late Wednesday on the third day of the partial opening of Rafah crossing point. Witnesses told The Associated Press that several masked militants opened fire in the air and stopped the bus half an hour after it rolled into the restive peninsula. They grabbed four youths and fled the scene.