BAGHDAD (AP) — Iraqi officials said Sunday the residence of Prime Minister Mustafa al-Kadhimi was hit by rocket fire but he was unharmed in the attack.

Residents of Baghdad heard the sound of an explosion followed by gunfire from the direction of the capital’s heavily fortified Green Zone, which houses foreign embassies and government offices.

Two Iraqi officials said al-Kadhimi’s residence was hit by rocket fire. It was not immediately clear who fired the rocket. The officials spoke on condition of anonymity in line with regulations.

Pro-Iran Shiite militias supporters have been camped outside the Green zone for nearly a month after they rejected the results of Iraq’s parliamentary elections in which they were the biggest losers.