Long-standing antagonism between the United States and Iran have mostly played out on Iraqi soil in recent months. "The pretext that this attack came as a response to the aggression that targeted the Taji base is a false pretext; one that leads to escalation and does not provide a solution," Iraq's Joint Operations Command said in a statement.
It said that as well as the six killed, 12 people had been wounded in the US air strikes, and that infrastructure, weapons and equipment at targeted military sites were destroyed. The Pentagon said the strikes targeted five weapons stores used by Kataib Hezbollah militia, including facilities housing arms used in past attacks on US-led coalition troops.
Official Iraqi casualty figures showed no paramilitary fighters had been killed. The military said three soldiers, two policemen and one civilian were killed, according to an initial toll, and that four soldiers, two policemen, a civilian, and five militiamen were injured. The civilians killed and wounded were construction workers at an airport building site in Kerbala, Iraqi religious authorities said.
PROXY WAR Around 5,000 US troops remain in Iraq, most in an advisory capacity, as part of a wider international coalition formed to help Iraq drive back and defeat Islamic State militants.
But the Iraqi military said the new US air attack went against "any partnership" under the coalition. "It will have consequences that subject everyone to the most serious dangers." Iran's foreign ministry said on Friday that the "presence and behaviour" of US and allied forces in Iraq was to blame for attacks against them.
Iranian-backed paramilitary groups have regularly rocketed and shelled bases in Iraq that host US forces and the area around the US Embassy in Baghdad. For its part, the United States has conducted several strikes inside Iraq, killing top Iranian general Qassem Soleimani and Kataib Hezbollah founder Abu Mahdi al-Muhandis in January.