A tanker was hit by unidentified projectiles off the coast of the United Arab Emirates, a British maritime agency said, according to AFP.

“A tanker has reported being hit by unknown projectiles,” the United Kingdom Maritime Trade Operations (UKMTO) said, adding that all crew members were safe.

The incident occurred 78 nautical miles north of the UAE city of Fujairah, the agency added. It called on vessels to transit the region “with caution” as authorities investigate.