The Maritime and Port Authority of Singapore (MPA) has received a report that a Singapore-registered barge, the Posh Mogami, sank two nautical miles northeast of Sekupang, Batam, on Friday night.
There were nine persons on board the barge when the incident happened.
It was reported that the semi-submersible barge was carrying out submerging trials at the time of the incident.
Indonesian authorities rescued six persons, including two Singaporeans, one Malaysian, one Dutch, one Filipino, and one Indonesian.
The three recovered bodies, included one Singaporean, one Chinese, and one Myanmar national.
As the flag administration of the Posh Mogami,the MPA is investigating the cause of the incident with the relevant authorities.
The 30,500 deadweight semi-submersible barge was built in 2012 and classed by the ABS.