North Korea fired two long-range strategic cruise missiles on Saturday morning as part of a “tactical nuclear attack virtual launch exercise” in response to U.S.-South Korea military drills, state media announced.

A specialized Korean People’s Army unit conducted the launch from the Chongchon River toward the Yellow Sea (West Sea), the official newspaper Rodong Sinmun reported Sunday. The launch reportedly simulated a target distance of roughly 930 miles (1,500 km) over a timespan of over two hours.