Two rockets targeted an airbase at Iraq's Baghdad airport housing US-led coalition troops on Sunday, in the second such attack in 10 days, the Iraqi army said. One of the projectiles was intercepted by the C-RAM counter rocket, artillery and mortar system deployed to protect US troops in Iraq, a security source told AFP. There was no immediate claim of responsibility for the attack which the army said caused no casualties. Washington routinely blames Iran-linked Iraqi factions for such attacks on its troops and diplomats. Sworn foes Tehran and Washington have both had a presence since 2003 in Iraq, where 2,500 US troops are still deployed. Last week, three rockets crashed into the sector of the Baghdad airport base occupied by Iraqi troops, wounding one soldier.