The United States condemned the downing of a U.S. spy drone by a Russian fighter jet over the Black Sea on Tuesday, in an incident that underscored how the Ukraine war has increased the risk of direct confrontation between Moscow and Washington.

Two Russian Su-27 jets carried out what the U.S. military described as a reckless intercept of the MQ-9 “Reaper” drone in international airspace before one of them collided with it at 7:03 a.m. (0603 GT), causing the drone to crash into the sea.