DHAKA, Bangladesh (AP) — At least seven people were killed and another 25 injured after a gas pipeline exploded in southeastern Bangladesh on Sunday, police said. The explosion at Patharghata area in Chittagong district collapsed portions of a boundary wall of a nearby building, local police chief Mohammed Mohsin said. He said at least 25 people were hospitalized and firefighters joined the rescue operation. It was not immediately clear what caused the explosion.Read more on NewsOK.com