Three U.S. soldiers of the 1st Marine Expeditionary Force were among four killed in violence in Iraq Saturday, the U.S. military said.

The three soldiers died in the Anbar province west of Baghdad, bringing the number of U.S. troops killed in the Iraq war so far to 2,535, CNN reported.

Gunmen attacked a vehicle in south-central Baghdad Saturday, killing a woman and wounding her male passenger, police said.

Gunmen also opened fire on vehicles carrying a Shiite family of five moving from Baghdad to Karbala and also killed three workers in an ice cream parlor in a predominantly Shiite neighborhood of the capital, Sky News reported.