UPDATE 1-Huge explosion heard in Somali capital, cause unknown

A huge explosion was heard in the Somali capital on Wednesday, sending large clouds of smoke into the sky, a Reuters witness said. The cause was yet to be determined.

The blast came from the direction of a busy road in Mogadishu. On Saturday 15 people were killed in two explosions and a gunfight between fighters belonging to al Qaeda-linked al Shabaab and security personnel in the heart of the capital Mogadishu, including an assistant minister. (Reporting by Abdi Sheikh; Writing by George Obulutsa)