The United States and Iran have reached an agreement to end the war and open the Strait of Hormuz, offering relief to the global economy more than three months since fighting began.

Full details of the deal were not immediately available. The signing will be Friday in Switzerland.

U.S. President Donald Trump confirmed a deal had been reached and said he had authorized an end to the U.S. naval blockade of Iranian ports in the Strait of Hormuz.

“Congratulations to all!” he wrote on social media, without providing details. He added, “Ships of the World, start your engines. Let the oil flow!”

The U.S. previously said it would ease its blockade of Iranian ports as the strait reopens, and would agree to relax sanctions to allow Iran to sell more of its oil and strengthen its battered economy.