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Washington CNN  — 

The US carried out airstrikes targeting two facilities linked to Iranian-backed militias in eastern Syria on Thursday, according to a statement from Defense Secretary Lloyd Austin, following a series of drone and rocket attacks against US forces in the region.

The US assessed that the airstrikes against the facilities linked to Iran's Islamic Revolutionary Guard Corps and affiliated groups did not result in any casualties, according to a Friday statement from Brig. Gen. Pat Ryder, the Pentagon press secretary.