It says the commandos injured three pirates during a gun battle on board the Malaysian-flagged MT Bung Laurel chemical tanker on Friday.

The navy was alerted by a distress signal from the vessel's crew.

Kuala Lumpur is now considering whether the pirates should face trial in Malaysia.

"We will determine what we should do, whether we are going to bring them here to be tried or take any other appropriate action," Malaysian Prime Minister Najib Razak said.

He also said he was "proud of our navy, which acted with full efficiency and demonstrated courage".

The Malaysian Royal Navy said an attack helicopter was also involved in the rescue operation about 555km east off the coast of Oman.

BBC