Police and ambulances are pictured near the scene of a bombing of a military bus in Tunis, Tunisia November 24, 2015. At least 12 people were killed on Tuesday after an explosion tore through a bus full of Tunisian presidential guards in an attack one source said was probably carried out by a bomber detonating his explosives in the vehicle. Ambulances rushed wounded from the scene and security forces closed off streets around Mohamed V Avenue, one of the major streets in the capital Tunis and where the charred wreckage of the bus lay not far from the interior ministry. REUTERS/Anis Mili