U.S. Secretary of State Mike Pompeo on Friday carried out a flurry of telephone diplomacy, speaking with foreign leaders following Washington’s killing of a top Iranian commander that has sent the region on edge.

Pompeo spoke with China’s chief diplomat Yang Jiechi, British Foreign Secretary Dominic Raab, French Foreign Minister Jean-Yves Le Drian, German Foreign Minister Heiko Maas, Pakistani Chief of Staff General Qamar Javed Bajwa and Afghan President Ashraf Ghani, according to the State Department.

The flurry of diplomatic activity comes as the region braces for possible retribution from Iran after the U.S. confirmed it carried out a strike near Baghdad’s airport that killed Qasem Soleimani, commander

Read more: US' Pompeo talks Soleimani killing with foreign leaders