Iran’s army said Thursday it targeted key US military facilities at Bahrain’s Sheikh Isa Air Base with one-way attack drones amid an exchange of attacks between Tehran and Washington across the Middle East region.

In a statement, the army’s public relations office said the operation was carried out in retaliation for the killing of an Iranian Air Force Su-24 pilot at the start of the US-Israeli war on Iran in February, the official IRNA news agency reported.

It said the drones struck power generators, navigation systems and administrative and support buildings used by what it described as the US military at Sheikh Isa Air Base.

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The military claimed that repeated attacks on US bases in the region over recent days had inflicted “significant damage” on military equipment and facilities despite the bases being protected by multiple air defense systems.