A huge explosion has killed several people near the port of the Somali capital, Mogadishu, reports say.
Witnesses say they saw about seven bodies. The blasts were followed by the sound of gunfire.
One report said a suicide bomber had targeted a tax collection facility at the port but this was not confirmed.
No group has said it carried out the attack but the Somali Islamist group al-Shabab often carries out such bombings in the capital.