BAGHDAD - Three US marines and a sailor were killed in combat in the restive western Iraqi province of Al Anbar, the US military reported Monday.
The servicemen died in action Sunday while serving with the Army's 2nd Brigade Combat Team, based in Anbar's province's capital Ramadi.
The US military on Sunday announced the deaths of six of its troops across Iraq, including two pilots of an Apache helicopter that was shot down by insurgents.
The military said the two pilots of the helicopter that crashed Saturday evening after coming under enemy fire were presumed dead.
"As reported earlier, the aircraft was conducting a combat air patrol. Military officials believe the crash was the result of hostile fire," the military said in its statement.
The Apache Longbow helicopter went down Saturday at 5:30 pm (1330 GMT) southwest of Baghdad near Yussifiyah.
Earlier Sunday, an Iraqi insurgent group claimed responsibility for the attack in an unconfirmed statement published on the Internet.
"The lions of Islam in the Maath bin Jabal brigade of Al-Rashideen Army managed to down a helicopter of the US occupation forces in the Yussifiyah area south of Baghdad," said the statement.
The group has posted a steady stream of videos and statements on the Internet, including videos of what it claimed were two recent mortar attacks on the US embassy in Baghdad.
The latest chopper crash is the fourth such aircraft crash in Iraq involving the US military since January 2006.
In January, three US military helicopter crashes claimed the lives of 16 people.
The military also announced the deaths of four more troops since Thursday, including two soldiers killed together late Saturday by a roadside bomb attack during a foot patrol in central Baghdad.
An American soldier died near the oil-rich city of Kirkuk, northern Iraq, and the other was killed in combat in the restive western province of Al-Anbar.
The latest casualties bring the toll of American servicemen killed in Iraq since the 2003 US-led invasion to 2,335, according to an AFP count based on Pentagon figures.
The latest deaths bring the toll of US servicemen killed in Iraq since the March 2003 invasion to 2,339 according to an AFP count based on Pentagon figures.