Police source tells Al Jazeera the attack hits positions of the Iran-aligned PMF, which the US has increasingly targeted.

An aerial attack on a military base in western Iraq’s Anbar province has killed seven fighters and wounded 13, according to Iraq’s Ministry of Defence.

The strikes on Wednesday targeted the military healthcare clinic at the base in Habbaniyah, according to the ministry. It called the attack “a heinous crime” that violated “all international laws and norms”.

An Iraqi police source told Al Jazeera the attack targeted positions of the Iraqi military’s Popular Mobilisation Forces (PMF), a paramilitary force that includes some Iran-aligned brigades and reportedly shares the base with members of Iraq’s regular army.

“What we understand from the military here is that air strikes were carried out and then further strikes carried out on that same position,” said Al Jazeera’s Assed Baig, reporting from Baghdad. He said it appeared to be the first time the PMF was hit alongside the broader Iraqi military.

Iraq has denounced the attack as the country has been dragged into the United States-Israeli war on Iran. On Tuesday, Iraqi Prime Minister Mohammed Shia al-Sudani’s office said Baghdad would summon the Iranian and US ambassadors over the recent strikes.

‘Right to respond’

A security official quoted by the AFP news agency said the strike occurred at the same base that suffered a deadly attack the day before.

Tuesday’s strike, which the PMF blamed on the US, was the deadliest in Iraq since the start of the war on Iran on February 28, It killed 15 fighters, including a commander.

The attack prompted Iraq’s government to grant the PMF a “right to respond” to any attack against it, a position Baghdad reaffirmed on Wednesday.

“We reserve our full right to take all necessary measures to respond to this aggression within the established legal frameworks,” the Defence Ministry said.

Since the war began, pro-Iran armed groups have claimed responsibility for attacks on US interests in Iraq and across the region while strikes have also targeted these groups, including at government-linked positions.

The US Department of Defense has acknowledged that combat helicopters have carried out strikes against pro-Iran armed groups in Iraq during the current conflict.

Baig said the latest strikes demonstrate “an escalation in terms of the PMF being targeted”.

“Increasingly, Iraq is becoming a battlefield between Iraqi armed factions and the United States,” he said.