AlQa'dah 16, 1433, Oct 2, 2012, SPA - A loud blast was heard in the former al Shabaab stronghold of Kismayu in Somalia on Tuesday, residents said, and the al Qaeda-linked militants said they had detonated a bomb at a building housing Somali troops, according to Reuters. There was no immediate word on casualties. "The bomb was planted inside a district administration office building," al Shabaab spokesman Sheikh Abdiasis Abu Musab said, warning of more attacks.