The Iraqi Popular Mobilization forces announced in a statement on Monday, the killing of a number of its fighters in strikes carried out by the United States on the Syrian-Iraqi border in the Al-Qaim area in Anbar Governorate, targeting the "headquarters" of one of its brigades, vowing to "take revenge."

Sources in the Popular Mobilization said that the number of dead people who were targeted in the strike from Kata'ib Sayyid al-Shuhada, one of the groups most loyal to Iran, is officially four.

This faction is among the factions of the Resistance Coordination, which includes factions affiliated with the PMF and active in Syria. In the statement, PMF vowed that they "will not remain silent on the continued presence of the American occupation forces, which is contrary to the constitution, the decision of Parliament, and the will of the Iraqi people."

On Monday, the United States announced that it had launched air strikes targeting "facilities used by Iranian-backed militias" on the Syrian-Iraqi border.

For its part, the Syrian Observatory for Human Rights reported that at least seven members of pro-Iranian factions were killed in the US air strikes.

These strikes targeted operational facilities and weapons depots at two locations in Syria and one location in Iraq, according to the Pentagon. "These targets were chosen because these facilities are used by Iranian-backed militias participating in drone attacks against US personnel and facilities in Iraq," a Pentagon spokesman said.

American interests in Iraq have been subjected to repeated attacks in recent months, for which no party has claimed responsibility, and the Americans have attributed them to pro-Iranian factions in Iraq.

In total, 44 attacks were carried out against American interests and Iraqi military bases that house Americans in Iraq, five of them by drones, the last of which was two days ago near the American consulate in Erbil. Experts attribute this technology to the armed factions loyal to Iran in Iraq, and is similar to the attacks launched by the Houthi rebels loyal to Iran in Yemen, against Saudi Arabia.

Both the United States and Iran have a military presence in Iraq, as the United States leads the international coalition that has been helping Iraq fight the Islamic State since 2014, and deploys about 2,500 soldiers in the country. For its part, Iran supports the Popular Mobilization Forces.

The issue of the US withdrawal from Iraq may be one of the items of Al-Kazemi's discussions with US President Joe Biden on his upcoming visit to the United States, which his spokesman announced on June 22.

On April 7, the United States and Iraq resumed the "strategic dialogue" aimed at setting a timetable for the withdrawal of the international coalition forces from Iraq.

In addition to Washington, the Iraqi prime minister announced in an interview two days ago with the official Iraqi channel that Iran's president-elect, Ibrahim Raisi, who is scheduled to take office in August, has invited him to visit Tehran as well.

The escalation between the United States and Iran reached its climax on January 3, 2020, when the commander of the Quds Force in the Iranian Revolutionary Guard, General Qassem Soleimani, and the deputy head of the Popular Mobilization Forces, Abu Mahdi al-Muhandis, were killed in a raid by a US drone near Baghdad International Airport.