A bomb blast killed one person and wounded six in the Somali capital Mogadishu on Thursday in what appeared to be a failed attack on an African Union (AU) peacekeeping delegation, witnesses and officials said. The explosion went off outside the former ministry of foreign affairs minutes after a visiting AU fact-finding team passed by on its way to a nearby airstrip, witnesses said. "This was a clear attempted attack on the AU delegation," a senior Somali official said.