Mogadishu police official Mohamed Hussein said Tuesday that the bomb was concealed inside a Somali military pick-up truck in Mogadishu's sprawling Bakara market.
It was not immediately clear who was responsible for the attack or how the bomb was detonated, but the al-Qaida-linked rebels of al-Shabab frequently stage similar attacks in Mogadishu and elsewhere in Somalia.
The extremist al-Shabab lost control of Mogadishu in 2011 but still holds sway in large parts of rural southern Somalia.
Take ABC13 with you!
Download our free apps for iPhone, iPad, and Android devices