Iraqi Prime Minister Mustafa al-Kadhimi said on Sunday that he had identified the perpetrators of a failed assassination attempt on his residence in capital Baghdad.

"We will pursue those who committed the crime. We know them well, and we will reveal their identities," read a statement issued by the prime minister's media office.

The perpetrators also killed Nibras Farman, an Iraqi National Intelligence Service (INIS) officer, and they will be brought to justice, al-Kadhimi said without giving further details.

The prime minister escaped unharmed from a pre-dawn armed drone assassination attempt on his residence in the heavily fortified Green Zone, which houses some of the main offices of the Iraqi government and foreign embassies.

The Iraqi security forces on Sunday identified the launch area, and claimed that the attack was made by two drones which flew at a low altitude to avoid being discovered by radars, local television reported.

"The two drones which attacked the prime minister's house were launched from an area located 12 kilometers northeast of Baghdad," Yahia Rasoul, spokesperson for the commander-in-chief of the Iraqi forces, told the state-run Iraqiya channel.

According to Rasoul, the assassination attempt was "carefully planned."

On Sunday, U.S. President Joe Biden condemned the attack and said his administration would help Iraqi security forces identify those responsible. 

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The assassination attempt came amid protests by followers of political parties rejecting last month's election results.

On Friday, the protests escalated into a clash with the security forces at the entrances of the Green Zone, which left two protesters killed and dozens of security members and protesters injured.

In the parliamentary elections on October 10, the Sadrist Movement, led by prominent Shiite cleric Moqtada al-Sadr, took the lead with more than 70 seats, while the al-Fatah (Conquest) Coalition garnered 17 seats compared with 47 in the 2018 elections.

Political parties questioning the results said the elections were manipulated and they would not accept the "fabricated results."

Followers of the political parties rejecting the election results took to the streets in many Iraqi cities, including capital Baghdad, when the Iraqi Independent High Electoral Commission is still considering the appeals and complaints submitted by the political parties.

(With input from Xinhua)