The US marines killed 32 gunmen in a fresh clash which flared out in the Ramadi area Friday, a statement by the Multi-National Forces based in Iraq said. Witnesses told KUNA however that two civilians were killed and three were injured during the clash.In the meantime, a force unit combined of the MNF and Iraq security men arrested 49 suspected terrorists in different areas of the Iraqi capital. The force has cracked down at 350 houses in the city to clean it up of what MNF has described as "terror acts". The iraqi side has led the operation, according to the statement. Another 20 suspected terrorists were arrested in the city of Dour, another MNF statement reported. Little resistance to the operation was reported.