The US military has carried out new strikes targeting an Iranian drone operation that posed a threat to US forces and commercial shipping in the Strait of Hormuz, a US official said, hours after President Donald Trump dismissed an Iranian report of a deal to restore traffic through the strategic waterway, according to Reuters.

The US official, who requested anonymity to speak candidly about military operations, tells Reuters the military shot down four Iranian attack drones and struck a ground control station in the port city of Bandar Abbas that was about to launch a fifth drone.

“These actions were measured, purely defensive and intended to maintain the ceasefire,” the official said.