The United States launched a new round of military strikes against Iran and revoked a key sanctions waiver covering Iranian oil sales after accusing Tehran of attacking commercial shipping in the Strait of Hormuz, putting a fragile cease-fire into peril.

Control over the Strait of Hormuz has remained a major point of contention between the U.S. and Iran even after the two countries signed a temporary peace deal last month.

The United States revoked a temporary sanctions waiver for Iranian oil Tuesday after three tankers were struck in the Strait of Hormuz, raising pressure on Tehran as it negotiates…

The United States on Tuesday (local time) revoked a 60-day sanctions waiver that had allowed the sale of Iranian oil, according to the Treasury Department.