Twin blasts followed by heavy gunfire were heard in northern Galkayo city, targeting a local administrative headquarters of Puntland state of Somalia, witnesses said.
Reports say gunmen stormed the building after blasting their way onto the ground. The gunmen are reportedly exchanging gunfire with security forces.
Minutes later, another car bomb happened in the same area, with reports that both attacks were targeted on the Puntland administrative offices.
Details of the casualties are yet sketchy.