The tanker was reportedly struck by an unknown projectile while sailing near the Strait of Hormuz on Monday, the UK Maritime Trade Operations (UKMTO) said.
The Wall Street Journal, citing unnamed US officials, reported that Iran’s Islamic Revolutionary Guards Corps (IRGC) opened fire on two commercial ships near the strait. Axios, citing unnamed US officials, reported that Iran fired a missile at a commercial ship passing through the strait.
According to UKMTO, the ship reportedly collided with its port side eight nautical miles east of Lima, Oman, causing a fire. It added that no casualties or environmental impacts were reported.
The reported attack occurred hours before US President Donald Trump was due to depart for a high-stakes NATO summit in Ankara, Turkey. The summit is scheduled to discuss security across the strait and comes as Iran oversees the multi-day funeral of its slain former supreme leader Ayatollah Khamenei.
Tehran suspended fragile negotiations with the United States aimed at reaching a lasting deal to end the conflict during days of memorial services for Khamenei, who was killed in a U.S. and Israeli attack on the first day of the war in February.
CNN has reached out to U.S. Central Command, which directs military operations in the Middle East, Central and South Asia, for comment.
Iranian authorities have repeatedly used the Strait of Hormuz, through which about a fifth of the world’s oil flowed before the war, as a bargaining chip.
The Iranian government has sought to strengthen its influence by insisting that crew members must obtain permission to transit the strait along routes approved by officials.
On Sunday, the Revolutionary Guards warned that the navy had sent patrol vessels to cut off the “Oman sea route,” according to Iranian media and the Revolutionary Guards-affiliated Telegram channel.
UKMTO said in a post on Sunday that traffic through the Channel had stabilized in recent days but had not increased, warning that there remained a risk to ships transiting the vital waterway.
The UKMTO post referred to the Memorandum of Understanding agreed between the US and Iran last month and said: “Although the risk remains lower than in the pre-Memorandum period, Iran’s intent and ability to carry out deliberate hostilities remains and despite the lack of recent escalation, the environment continues to require heightened vigilance.”
According to Monday’s update from maritime tracking agency Marine Traffic, 108 boats crossed the Channel between Friday and Sunday. Before the war, an average of more than 100 ships passed through the strait each day.
