Four US service members killed in plane crash over Iraq

WASHINGTON, March 13 (Reuters) - Four of the six crew members aboard a U.S. military aircraft that crashed in western Iraq are confirmed to have been killed, the U.S. military said on Friday, as rescue efforts continued for the remaining two.

A U.S. military refueling aircraft crashed in western Iraq on Thursday, in an incident the military said involved another aircraft but was not the result of hostile or friendly fire.

"The circumstances of the incident are under investigation. However, the loss of the aircraft was not due to hostile fire or friendly fire," a statement from U.S. Central Command said.