The U.S. military launched a fresh round of airstrikes against targets in Iran on Saturday, hours after officials there said they were targeting U.S. interests in the Middle East.

The clashes marked the latest threat to a ceasefire and talks toward a broader peace. U.S. Central Command said its forces targeted Iranian military infrastructure, including communication systems, air defense sites and drone storage facilities, along with its capabilities to lay mines, in response to what it called “continued Iranian aggression against commercial shipping.”