A doctor shows the X-ray of Lieutenant Abdulla, who is injured after a bomb exploded, at the Bahrain Defence Force Hospital in Riffa, May 5, 2012. Four policemen were injured late Friday night when a bomb went off at village Bani Jamra, west of Manama. The bomb was found to be a homemade explosive device with a remote detonator, the interior ministry said. REUTERS/Hamad I Mohammed (BAHRAIN - Tags: CIVIL UNREST CRIME LAW)