Yemen's Houthis attacked al-Dhabba oil terminal in Hadhramaut province on Monday, the group and Yemen's internationally recognised government said, Trend reports citing Reuters.
The Iran-aligned Houthis fired a projectile from a drone that landed at the entrance of the terminal, which is located in the town of al-Shihr, two workers at the terminal told Reuters.
Panamanian-flagged vessel Pratika had entered the terminal to load a shipment of crude but left after the attack, the workers said.
The Maritime Trade Operations (UKMTO), which is part of the British Royal Navy, said it received a report that a missile or rocket attack had been carried out at al-Shihr against a single-point mooring at 1212 GMT. All crew and the vessel were safe, UKMTO said, withholding the ship's name.
The Houthis' military spokesman said a ship was forced to leave the port at al-Dhabba.
Refinitiv data showed Pratika in the Gulf of Aden at 1952 GMT, headed for Suez.