Airstrike said to kill al-Shabaab leaders MOGADISHU, Somalia, Feb. 24 (UPI) -- An airstrike in an area of southern Somalia held by al-Shabaab militants killed at least six people, including some foreigners, officials said Friday. Witnesses said the strike destroyed two vehicles in a convoy in the Lower Shabelle region, about 35 miles south of Mogadishu, the BBC reported Friday. Shabelle News said unidentified planes fired at cars transporting militants and killed some of al-Shabaab's leadership, including Sheik Abukar Hajji Ahmed. Witnesses told the BBC some of the victims appeared to be European or Asian. It was unclear who carried out the strike. Al-Shabaab recently announced it was joining al-Qaida and reportedly has 200 non-Somali fighters, the BBC said. Witnesses said the explosion was heard many miles away.