The U.S. military said five soldiers were killed Friday in two separate incidents in Iraq.

Four soldiers died when their vehicle struck an improvised explosive device while the troops were on a combat patrol northwest of Baghdad, the military said.

In violence near Tikrit, another soldier and killed and three others wounded in an explosion near their vehicle as thy carried out operations in Tamim province, the military said in a statement.

The wounded soldiers were transported to a coalition medical facility for treatment.

No other information on the attacks was immediately released, and names of the casualties were being withheld pending family notification.