CAIRO (AP) — U.S. President Donald Trump has threatened military action against Oman over its involvement in a deal with Iran concerning the management of the Strait of Hormuz. Two regional officials revealed this information after Trump’s warning.

The Trump administration has expressed disapproval of the proposed agreement between Oman and Iran, specifically opposing the joint management of the crucial exit route for oil and natural gas supplies. The officials, briefed on the U.S. stance, discussed how the administration views Oman’s position.

Meanwhile, maritime incidents have increased tension in the region. A projectile reportedly hit a ship departing the strait. Separately, multiple projectiles rendered a cargo vessel a “constructive total loss” off Yemen’s coast. Britain’s military maritime monitoring agency reported these events. The UAE’s defense ministry stated that Iran launched two ballistic missiles towards its territory.

An Iranian spokesperson declared the strait would remain closed until U.S. conditions were met.

The U.S. believes Oman has not sufficiently restrained Iran in negotiations. Oman has agreed on voluntary fees from vessels for security and environmental protection purposes, which the U.S. finds objectionable, according to anonymous officials.

President Trump has publicized on social media his interest in claiming the strait as U.S. territory, first mentioned in passing last week. The White House has limited comments about Trump’s statement.

Iranian Deputy Foreign Minister Kazem Gharibabadi mocked Trump’s assertions online, calling it a ‘delusion,’ and warned of corrective measures.

Trump previously threatened Oman, stating in May that the country must conform or face consequences. Iran reiterated on Tuesday its commitment to maintain control over the strait until U.S. commitments under their agreement are fulfilled, including lifting sanctions and releasing frozen assets.

The Egyptian Foreign Ministry expressed hope that the Iranian-Omani deal could restart negotiations between the U.S. and Iran for a comprehensive agreement enhancing regional stability.

Despite the ongoing conflicts, Trump insists the strait is operational, even though traffic is limited. He confirmed the U.S. blockade endures, with all mines cleared.

New reports of attacks in the region have appeared. Missiles aimed at the UAE, according to its defense ministry, landed in the sea without causing harm. No immediate statement followed from Iran.

A projectile damaged a ship’s engine room in the strait, reporting one casualty. The U.K. Maritime Trade Operations center disclosed the incident, with Omani authorities assisting and investigating.

The conflict in the Red Sea’s proximal area has exacerbated tensions. Houthi rebels resumed attacks on commercial vessels, escalating assaults on Yemen’s Saudi-backed government. These incidents threaten Bab al-Mandab Strait, another vital trade route.

Elsewhere, Houthi forces claimed an attack on a Saudi oil refinery, operated by Saudi Aramco, potentially reigniting Yemen’s civil war.

Associated Press Writer Sally Abou AlJoud in Beirut contributed to this report.