Large blast heard in centre of Somali capital - witness

MOGADISHU (Reuters) - A large blast followed by gunfire was heard on Tuesday in the centre of the Somali capital, a Reuters witness said. There were no immediate details or reports of casualties but the Islamist militant group al Shabaab has frequently carried out bomb and gun attacks in Mogadishu. (Reporting by Abdi Sheikh; Writing by Edmund Blair; Editing by George Obulutsa)