At least three rockets landed on Monday on the Ain al-Asad air base, which hosts US and other international forces in western Iraq, but caused no casualties, a coalition spokesman said.
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US Army Colonel Wayne Marotto, spokesman for the US-led international military coalition, tweeted that initial reports suggested the attack took place at 2:45 p.m. Marotto said the damage was being assessed.
There was no immediate claim of responsibility for Monday's attack.