BAGHDAD (AP) — Iraq’s Prime Minister Mustafa al-Kadhimi survived an assassination attempt with an armed drone that targeted his residence early Sunday, and is unharmed, officials said.

Two Iraqi officials told The Associated Press that seven of his security guards were injured in the attack which occurred in Baghdad’s heavily fortified Green Zone area. They spoke on condition of anonymity because they were not authorized to give official statements.

The prime minister tweeted shortly after the attack: “The rockets of treason will not shake one bit of the steadfastness and determination of the heroic security forces.”

“I am fine and among my people. Thank God,” he wrote.

In a statement, the government said the drone tried to hit al-Kadhimi’s home, adding that he was “unharmed and in good health.” Residents of Baghdad heard the sound of an explosion followed by gunfire from the direction of the Green Zone, which houses foreign embassies and government offices.

The statement released by state-run media said the failed assassination attempt was with “an explosives-laden drone that tried to target his residence in the Green Zone.”

“The security forces are taking the necessary measures in connection with this failed attempt,” it said.

It was not clear who was behind the attack, nor did anyone immediately claim responsibility. It comes amid a stand-off between security forces and pro-Iran Shiite militias whose 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.

Protests turned deadly Friday when the demonstrators marched toward the Green Zone. There was an exchange of fire in which one protester was killed. Dozens of security forces were injured. Al-Khadimi ordered an investigation to determine what sparked the clashes and who violated orders not to open fire.

The United States, the U.N. Security Council and others have praised the Oct. 10 election, which was mostly violence-free and without major technical glitches.

Following the vote, militia supporters had pitched tents near the Green Zone, rejecting the election results and threatening violence unless their demands for a recount were met.

The unsubstantiated claims of voter fraud have cast a shadow over the vote. The standoff with the militia supporters has also increased tensions among rival Shiite factions that could reflect on the street and threaten Iraq’s newfound relative stability.

The election was held months ahead of schedule in response to mass protests in late 2019, which saw tens of thousands in Baghdad and predominantly Shiite southern provinces rally against endemic corruption, poor services and unemployment. They also protested against the heavy-handed interference of neighboring Iran in Iraq’s affairs through Iran-backed militias.

The militias lost some popularity since the 2018 vote, when they made big election gains. Many hold them responsible for suppressing the 2019 protests, and for challenging the state’s authority.

The biggest gains were made by influential Shiite cleric Muqtada al-Sadr, who won the largest number of parliament seats, 73 out of 329. While he maintains good relations with Iran, al-Sadr publicly opposes external interference in Iraq’s affairs.

The protests appeared to be aimed at pressuring al-Sadr to ensure that Iran-aligned factions are part of the next Cabinet. As the winner, al-Sadr’s bloc will seek coalition partners and name the prime minister.