Hundreds of thousands of mourners gathered for the funeral procession carrying the coffins of Iran's late Supreme Leader Ali Khamenei during a mass funeral march near Azadi Square in Tehran on Monday. Photo by Behnam Tofighi/UPI | License Photo

July 9 (UPI) -- Iran's Islamic Revolutionary Guard Corps said early Thursday that it has launched attacks targeting U.S. bases in Kuwait and Bahrain, hours after U.S. Central Command announced the completion of its attacks against Iran.

The tit-for-tat strikes follow President Donald Trump a day prior saying the cease-fire agreement between Washington and Tehran was all but over, and threatened the return to all-out war in the Middle East.

Fighting had simmered between the two sides following last month's agreement to conditions that could lead to an end of the war, but the Strait of Hormuz has proved a sticking point. The Trump administration is demanding a return to freedom of navigation through the chokepoint; Iran is seeking to maintain control over the vita energy transit route.

As negotiations were stalling, three commercial vessels were struck while transiting the strait, resulting in the United States attacking Iran early Wednesday, kicking off the continuing retaliatory strikes as Iran appears unrelenting in its oversight of the Strait of Hormuz.