Iran said it used “precision missile and drone strikes,” to destroy two strongholds of the Sunni militant group Jaish al-Adl, known in Iran as Jaish al-Dhulm, in the Koh-e-Sabz area of Pakistan’s southwest Balochistan province, according to Iran’s state-aligned Tasnim news agency.

Tuesday’s attack comes after Iran launched missiles in northern Iraq and Syria Monday, in the latest escalation of hostilities in the Middle East where Israel’s ongoing war in Gaza risks spiraling into a wider regional conflict.

Pakistan’s Foreign Ministry said the attack on its territory killed “two innocent children” and warned Iran of “serious consequences.”

It described the airstrike as an “unprovoked violation of its airspace by Iran … inside Pakistani territory.”

“It is even more concerning that this illegal act has taken place despite the existence of several channels of communication between Pakistan and Iran,” the ministry said.

Pakistan on Wednesday recalled its ambassador from Iran and suspended all Iraninan high-level visits.

“Last night’s unprovoked and blatant breach of Pakistan’s sovereignty by Iran is a violation of international law and the purposes and principles of the Charter of the United Nations,” Mumtaz Baloch, a spokesperson for Pakistan’s Foreign Ministry, said in a televised address.

She said the Iranian Ambassador to Pakistan should not return from a current visit to Iran and warned “Pakistan reserves the right to respond to this illegal act.”

China urged Iran and Pakistan to exercise restraint in handling their ongoing conflict after the deadly strike. The Chinese Foreign Ministry on Wednesday called on both countries to “avoid actions that would lead to an escalation of tension and work together to maintain peace and stability in the region.”

The Jaish al-Adl militant group late Tuesday said Iran’s Revolutionary Guards had used six attack drones and a number of rockets to destroy two houses where the children and wives of its fighters lived.

Authorities in Balochistan province told CNN two girls had died and at least four people were injured. The girls, aged eight and 12, were killed in houses that were damaged in the attack in the village of Koh-e-Sabz in Kulag, about 60 kilometers (37 miles) from Panjgur district, on Tuesday evening, according to the district’s deputy commissioner Mumtaz Khetran.

Khetran also said a mosque near the homes was targeted and hit in the strikes.

Koh-e-Sabz — about 50 kilometers (31 miles) from Pakistan’s border with Iran — is known to be the home of Jaish-ul-Adl’s former second-in-command Mullah Hashim, who was killed in clashes with Iranian forces in Sarawan, an Iranian region adjacent to Panjgur, in 2018.