12 members of the army and police were killed and wounded in two separate incidents in Salahuddin province.A security source told the reporter of the National Iraqi News Agency / NINA /: "Three soldiers were killed and five others injured, when a roadside bomb went off at an army patrol on the road between Tikrit and Mosul."The source added: "Four policemen, including an officer, were killed when a roadside bomb went off, targeting a checkpoint south of Samarra.