Iraqi security forces and Sunni tribal fighters launched an offensive on Tuesday to dislodge Islamic State militants and secure a supply route in Anbar province, police and tribal sources said.
In other action, bomb attacks across the country killed at least 32 people.
The deadliest was when a car packed with explosives was detonated in the mainly Shiite district of New Baghdad in northeastern Baghdad, killing 16 people and wounding 48.