Videos posted on social media and verified by the BBC show the moment a military base in Iraq housing a pro-Iranian militia was rocked by an explosion.
Local security officials said one person was killed and eight others injured.
The Iraqi military did not report any drones or fighter jets in the area before or during the explosion.
But the militia involved, the Popular Mobilization Forces (PMF), blamed the attack.
This comes amid heightened tensions between Israel and Iran.