Iran fired on three commercial vessels Tuesday in Oman’s territorial waters near the Strait of Hormuz, according to a US official.

The official described the strikes as a “gross violation” of the memorandum of understanding with Iran. The third strike had not previously been reported. The US has a broad range of potential responses to the alleged violations and is considering all of them, according to the official.

In a post to X on Tuesday alongside photos of crowds of mourners honoring Khamenei, Iranian Foreign Minister Abbas Araghchi warned that negotiations on a final deal “will not commence if threats continue.”

He invoked paragraph 13 of the US-Iran memorandum of understanding, which says the two sides must fulfill several conditions before they can start negotiating a final deal.

Among those conditions is an end to all fighting, including in Lebanon, where Israel’s military carried out several strikes Monday, according to reports in Lebanese state media.