Three US soldiers died in a traffic accident and one US soldier was killed in combat on Sunday in Iraq, the military said.
According to a statement, the three soldiers from Task Force Danger were on a combat patrol early Sunday morning near the town of Balad, 80 km north of Baghdad.
The accident occurred when their military vehicle rolled into a canal, it added.
Later on Sunday afternoon, a US soldier was killed and another wounded near the restive town of Samarra, north of Baghdad.
"One Task Force Danger soldier was killed and one was wounded by indirect fire on a coalition forces base near Samarra," the military said in a separate statement, without providing further details.