Police and fire crews were rummaging through debris at an apartment complex in suburban Atlanta on Sunday after an explosion led to a partial collapse of a building, leaving at least four people injured, authorities said. The Dunwoody Police Department said they got calls shortly before 1:30 p.m. local time about an explosion at the Arrive Apartments, which is just north of Atlanta. Photos and videos show bricks and pieces of debris scattered with parts of a multi-level building pancaked. "This is a very active scene and the cause of the explosion is under investigation," the Dunwoody Police Department said on Twitter. Four people were hospitalized with injuries from the blast, including one person with burns and another with a fractured leg. Captain Jaeson Daniels said two people were unaccounted for and may have been in one of three apartments that had completely collapsed. 📸: Ben Gray, @apnews