A car bomb exploded inside a police compound in Somalia's capital on Friday, wounding two people, an official said. The blast rattled Mogadishu and sent smoke into the sky, but Lt. Aden Kalmoy Dhaqane, a military official, said the explosion wounded only two people. Police officer Dahir Mohammed said authorities had arrested two suspected suicide car bombers earlier Friday and had taken their car into the headquarters of the criminal investigations department, where it exploded. Mohammed said officials suspect it was detonated by a remote trigger. Suicide and car bomb attacks in Somalia are typically carried out by al-Shabab, the country's most dangerous militant group. Al Qaeda announced earlier this month that it was merging with al-Shabab.