Twenty-two US service members were injured in a helicopter "mishap" in northeast Syria, the US Central Command said late on Monday.
Ten service members had been evacuated to higher care facilities outside the Central Command area of responsibility, it said in a statement.
The cause of the incident on Sunday was under investigation, although no enemy fire was reported, said the US Central Command, which oversees US forces in the Middle East.
More to follow.

US proposes plan to end Iran war, as Trump signals progress
US expected to send thousands more soldiers to Middle East
US safety agency says tracking system failed at LaGuardia during jet collision
Russia fires record 948 drones against Ukraine over 24 hours, Kyiv says
Death toll rises to 69 in Colombian military plane crash
One killed, five injured in Bahrain from Iran strikes
Qatar is not directly mediating between US and Iran, ministry spokesperson says
Germany, France in rare rebuke of Trump over Iran war
