Two vehicles packed with explosives were detonated in Somalia's capital Mogadishu near a base for African Union troops next to the main airport, according to local witnesses.
"I can see ambulances taking several wounded people," a journalist near the scene told Al Jazeera.
News agencies reported several deaths.
The first blast happened near an entrance used by African Union forces and the second at a checkpoint manned by Somali government forces.
The al-Shabab armed group told Al Jazeera it was responsible for the attack.
"Our Mujahideen targeted Halane which is base to the foreign forces occupying our Muslim country. We have killed dozens of them," Abdulaziz Abu Muscab, a spokesman for the group, told Al Jazeera.
White smoke could be seen billowing over the city after the blast on Tuesday.
