Journalist Frederic Nerac went missing in Iraq in March 2003 shortly after the U.S.-led invasion.
A Foreign Ministry statement issued Thursday said Nerac died during a gun battle between Iraqi and U.S. soldiers, which took place when he was aboard an Iraqi vehicle.
France-led international opposition against the U.S.-led war, and contributed no troops to it.
French Foreign Ministry officials launched an inquiry into Nerac's fate eight months ago. They have yet to find his body.
'Happy' fan videos make Pharrell cry [VIDEO]
Pregnant Mila Kunis wins 'Best Villain' at MTV Movie Awards