MOGADISHU: At least 10 people were killed when two suicide car bombers attacked the local government headquarters in Somalia's Galkayo town in the semi-autonomous Puntland region on Sunday, police said, and the militant al Shabaab group claimed the attack. 'We have confirmed 10 people dead including civilians and security forces,' said Ali Ahmed, a police officer. Witnesses and residents said they heard two loud blasts in quick succession followed by heavy gunfire. 'There were two huge bombs. The first one was a truck bomb, followed a minute or so (later) by another car bomb. My brother was injured at the scene,' Halima Ismail, a local resident, told Reuters. Al Shabaab, which has been carrying out a series of deadly attacks in Somalia, said it was behind the attack. 'There were two suicide car bombs,' Abdiasis Abu Musab, the group's spokesman for military operations, told Reuters.