AFP reported on Tuesday that Iraqi forces took charge of security at Basra's oil export terminals at the southern port of Basra from US troops. Nearly 80 percent of Iraqi oil is exported through the south.
"Today, we took charge of the oil terminals at Basra from the Americans," an Iraqi navy official said, speaking on condition of anonymity.
State-run Al-Iraqiya television also reported that US forces had ended their security presence at the port.
The navy official said that "seventy-five percent of the American troops who were at the port left the facility, and the rest have stayed to train Iraqi forces. They will also withdraw gradually".
The move comes as the remaining 47,000 American troops are preparing to leave Iraq at the end of this year under the terms of the 2008 security agreement.