The United States launched new airstrikes against Iran early Thursday, and Tehran responded by targeting Bahrain, Kuwait and Qatar in crossfire that again threatened an interim deal intended to help end the war in the Persian Gulf.

The U.S. military said Wednesday that it was carrying out another round of strikes on Iran after the Islamic Republic attacked ships in Strait of Hormuz a day earlier.

Fresh wave of tit-for-tat attacks follows Donald Trump’s declaration that an interim agreement to end the war is ‘over’.