Thirteen people are feared dead after an Indonesian police plane lost contact during a flight on Saturday to the island of Batam near Singapore.
The plane, carrying five crew members and eight passengers, dropped out of contact mid-morning about 50 minutes after taking off from Bangka island off the south-east coast of Sumatra island, a police statement said.
National Search and Rescue Agency chief Henry Bambang Soelistyo said rescuers were searching waters between Mensanak and Sebangka islands.
He said villagers found a seat and a bag containing a cellphone and police documents.
TV footage showed that police uniforms and other articles of clothing also had been retrieved from the sea.
Local media, quoting the Tanjung Pinang naval base commander, reported that bodies had been recovered by villagers.