The small fibreglass boat overturned and sank late Monday with around 80 people onboard as a patrolling vessel was pursuing it off the state of Johor, the official with the Malaysian Maritime Enforcement Agency said.
“The boat carried illegal immigrants going back to Indonesia to celebrate the end of Ramadan,” the official said, adding that 59 people had been rescued.
“The boat was small and... overloaded,” said the official, who requested anonymity as he was not authorised to speak to the media.
He said the bodies of one man and a woman had so far been recovered.
The boat was heading to Indonesia’s Batam island and sank three nautical miles off Tanjung Piai, peninsular Malaysia’s southern-most point, he added, raising hope that some of those missing could have swum to safety.
He said authorities were still investigating the accident but the boatman – who is among those still missing – may have panicked when he saw the agency’s patrol vessel and lost control.
He denied local media reports that the two vessels collided.
Boat accidents are common as Malaysia draws hundreds of thousands of illegal immigrants from poorer regional countries who fill factory, plantation, construction and other mostly low-paid jobs shunned by locals.