BEIRUT (AP) — The United States military says a helicopter accidents in northeastern Syria over the weekend has left 22 U.S. service members injured to various degree. The military said in a statement on Tuesday that the cause of the “mishap” is under investigation. The military statement said the service members are receiving treatment and 10 have been moved to “higher care facilities” outside the region. It said the accident occurred on Sunday and that no enemy fire was reported. There are about 900 U.S. troops in Syria advising and assisting the Kurdish-led Syrian Democratic Forces in the fight against the militant Islamic State group.