Mortars slammed into Somalia's capital Thursday, killing at least 16 people and wounding more than 25, Mogadishu's ambulance service said. Ali Muse, a spokesman for the ambulance service, said the shelling started Thursday morning. Somalia's capital sees near-daily bloodshed as insurgents try to overthrow the government and push out African Union peacekeepers. Somalia has not had an effective government for 18 years, since warlords overthrew longtime dictator Mohamed Siad Barre in 1991. The warlords then turned on each other, plunging the Horn of Africa nation into chaos and anarchy.