Airstrikes hit a headquarters of Iraq’s umbrella group for Iran-backed Shi’ite militias and a residence belonging to its leader on Tuesday, killing at least 15 fighters in an escalation of U.S.-Israeli strikes on one of Tehran’s main regional allies.

At least 30 other people were wounded in the strikes on a headquarters of the Popular Mobilization Forces in Iraq’s Euphrates valley province of Anbar, according to medical officials who said some were in serious condition and the death toll could rise. Reuters filmed ambulances bringing the wounded to hospital in the regional capital Ramadi during the night.

The dead included the PMF’s operations commander in the province, Saad al-Baiji. Later on Tuesday, a large crowd of angry mourners carried his coffin and portraits through the streets of Baghdad.

Two security sources said the strikes had hit the PMF headquarters during a meeting attended by senior commanders.

A separate airstrike hit a residence belonging to the PMF’s leader Falih al-Fayadh in the northern city of Mosul. He was not present at the building which he uses only during visits to the city, according to the two security sources. A PMF statement said its office in the city was destroyed and one fighter wounded there.

Such damaging strikes against the PMF create political difficulty for Prime Minister Mohammed Shia al‑Sudani, who has to walk a careful line maintaining the support both of Washington and of factions in the Shi’ite-majority country that are aligned with Iran.

Sudani ordered an emergency meeting of the Ministerial Council for National Security to be convened, said a statement from the Iraqi military’s joint operations command.

The statement said the 15 PMF fighters were killed in a “U.S.-Zionist airstrike”, the first time Iraq’s military has blamed Israel alongside the United States for bombing the PMF.

The PMF, known in Arabic as Hashd al-Shaabi, is an umbrella group of mostly Shi’ite paramilitary factions that was formally integrated into Iraq’s state security forces and includes several groups aligned with Iran.

Tehran-backed armed groups have launched attacks on U.S. bases in Iraq and the U.S. embassy since the United States and Israel launched their war on Iran on February 28. Washington has had an influential presence in Baghdad since its 2003 invasion that overthrew dictator Saddam Hussein, a Sunni Muslim, and replaced him with Shi’ite-led governments friendly with Iran.

The U.S.-Israeli war on Iran has spilled across Iran’s borders, with Tehran launching strikes on Israel and Gulf Arab states hosting U.S. military installations, while Israel has carried out attacks in Lebanon following cross-border fire by Iran-aligned Hezbollah.

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(Reporting by Ahmed Rasheed and Muayad Hameed; Additional reporting by Enas Alashray and Yomna Ehab; Editing by Lincoln Feast and Peter Graff)