Alabama police search for clues in shooting that killed four at teen party

Attack at teenager's birthday party in Dadeville left 28 people injured on weekend of more shootings in America

Students at a small-town Alabama school, its flag flying at half-mast Monday, returned to class as investigators worked to piece together what happened at a Saturday night shooting that killed four people, including two Dadeville high school students.

The 485-student school is a center of civic life in Dadeville, population 3,200, where Home of the Tigers" is painted on the water tower. The attack at the teenager's birthday party also injured 28 at the Mahogany Masterpiece dance studio, where the teenage sister of one of the victims was celebrating her Sweet 16 birthday party.