The Pentagon says early indications suggest that a U.S. military helicopter that crashed in Iraq today had mechanical problems. But an Iraqi insurgent group claims on a Web site that its militants shot down the aircraft. All seven people aboard the chopper were killed.
The crash is the fifth such incident in less than three weeks.
In Bahgdad, Maj. Gen. William Caldwell said that after the recent crashes, the military is making changes.
"We are already making adjustments in our tactics, and techniques and procedures as to how we employ our helicopters in support of Iraqi security forces and coalition forces," Caldwell said.