At least five US personnel have been injured in an attack against a military base in Iraq, US officials tell Reuters, as the Middle East braces for a possible new wave of attacks by Iran and its allies following last week’s killing of senior members of Hamas and Hezbollah.

Two Katyusha rockets were fired at Al Asad airbase in western Iraq, two Iraqi security sources said. One Iraqi security source said the rockets fell inside the base.

It was unclear whether the attack was linked to threats by Iran to retaliate over the killing of the Hamas leader.

The US officials, who spoke to Reuters on condition of anonymity, said one of the wounded Americans was seriously injured. The casualty count was based on initial reports which could still change, they said.

“Base personnel are conducting a post-attack damage assessment,” one of the officials added.

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