April 18 (UPI) -- Just one day after the Strait of Hormuz was declared open, Iran has blocked the passage again, citing "breach of promise" by the United States, and has begun firing on commercial ships.

Iran accused the United States of "banditry and piracy under the guise of a so-called blockade."

"Until the United States ends its interference with the full freedom of movement for vessels traveling to and from Iran, the status of the Strait of Hormuz will remain under intense control and in its previous state," Iran's semiofficial Fars media said on X.

On Friday, Iranian Foreign Minister Seyed Abbas Araghchi said the Strait of Hormuz was open after a cease-fire in Lebanon.

But by Saturday morning, that had changed. President Donald Trump said the United States would continue blocking Iranian ships.