The attack, believed to be the first Israeli bombing in Iraq in nearly four decades, represents an expansion of the military campaign Israel has carried out against Iranian targets in Syria.

The Israeli attack last month was one of several recent attacks on weapons storage facilities controlled by Iraqi militias with ties to Iran. It was not clear who carried out the other attacks, which have set Iraq on edge as it struggles to recover from nearly 40 years of war and instability.

Responding to the attacks on Thursday, Iraq’s national security adviser, Falih al-Fayadh, said that Iraq wanted to avoid taking sides in any struggle between Iran and other countries and being “pushed into a war.”