A total of seven U.S. soldiers were killed and two more injured in separate incidents in Iraq, the U.S. military said on Monday.

Two soldiers assigned to Multi-National Division - Baghdad were killed and two others wounded on Saturday when a roadside bomb detonated while their unit was conducting a combat security patrol southwest of Baghdad, the military said in a statement.

The U.S. patrol was part of U.S.-Iraqi security crackdown aimed at curbing insurgency and sectarian violence, it added.

Four more soldiers from separate unit were killed on Sunday in another roadside bomb explosion while they were responding to the first roadside bomb attack in the southwest of the capital, the statement said.

In separate statement, a marine assigned to Multi-National Force - West died on Sunday due to non-combat related incident, in the volatile Anbar province in western Iraq, the military said.

The incident is currently under investigation, it added.

The names of the dead soldiers are being withheld pending notification of next of kin, the statements said.

More than 3,250 U.S. soldiers have been killed in Iraq since the U.S.-led invasion in March 2003, according to media count based on Pentagon figures.

Source: Xinhua