Pakistan on Friday expressed “deep concern” over the killing of Qasem Soleimani, commander of the Iranian elite Quds Force, in a U.S. drone strike in Iraq.

In a statement issued in Islamabad, Pakistani Foreign Ministry said the development in the Middle East has “seriously threatened peace and stability in the region.”

Pakistan also called on all concerned parties “to exercise maximum restraint, engage constructively to deescalate the situation.”

“Respect for sovereignty and territorial integrity are the fundamental principles of the UN Charter, which should be adhered to. It is also important to avoid unilateral actions and use of force,”

Read more: Pakistan: Soleimani killing threatens regional peace