The White House said on Monday recent dangerous encounters between U.S. and Chinese forces in the Taiwan Strait and South China Sea reflect a growing aggressiveness by Beijing’s military that raises the risk of an error in which “somebody gets hurt.”

Washington’s sharply worded warning followed the U.S. Navy’s release on Sunday of a video of what it called an “unsafe interaction” in the Taiwan Strait in which a Chinese warship crossed in front of a U.S. destroyer in the sensitive waterway.