A tanker was reportedly struck by an unknown projectile while sailing near the Strait of Hormuz on Monday, according to the UK Maritime Trade Operations (UKMTO).

Citing an unnamed US official, The Wall Street Journal reported that Iran’s Islamic Revolutionary Guard Corps (IRGC) had fired at two commercial ships near the Strait. Axios, citing unnamed US officials, reported Iran had fired missiles at commercial ships transiting through the strait.

The UKMTO said the vessel was eight nautical miles east of Limah, Oman, when it was reportedly struck on its port side, igniting a fire. No casualties or environmental impact have been reported, it added.

The reported attack occurred hours before US President Donald Trump departed for a high-stakes NATO summit in Ankara, Turkey, where leaders are expected to discuss security in the Strait, and as Iran observes a multi-day funeral for its slain former supreme leader Ayatollah Ali Khamenei.

CNN has reached out to US Central Command, which directs military operations in the Middle East, Central and South Asia, for comment.