SINGAPORE - The Maritime and Port Authority of Singapore (MPA) has expressed concern at a shooting incident involving the vessel Alpine Eternity, which occurred last Thursday in the Persian Gulf.

On May 14, Iranian Revolutionary Guard forces fired warning shots at the Singapore-flagged commercial ship in the Gulf, before vessels from the United Arab Emirates came to the ship's aid.

"Singapore is deeply concerned with such actions," said the MPA in a statement on Monday.

The MPA has also asked the Iranian maritime authorities to investigate the incident and to help prevent future recurrences.

The shooting incident was allegedly a response to a collision between Alpine Eternity and an Iranian offshore oil platform on March 22.

The ship manager, Transpetrol Ship Management, had reported the collision to MPA on March 23.

MPA had started a marine safety investigation into the incident, in accordance with the International Maritime Organisation's Casualty Investigation Code.

The investigation is still ongoing.