Search and rescue teams recovered four bodies Saturday in the waters between the Indonesian islands of Bali and Java, where a ferry capsized Friday.
People watching the doomed ferry were yelling as it tipped over.
Video showed passengers standing on the side of the ferry, then jumping into the sea as it sank quickly in calm waters.
Officials said 71 people were rescued.
Boats are a popular and relatively cheap form of transportation in Indonesia, a nation of 256 million people that spans more than 17,000 islands.
Sea accidents are common, with safety regulations often poorly enforced.
The ferry was traveling from a port in Bali to Banyuwangi on Java.
The cause of the disaster was under investigation.
(Copyright 2016 NBC News Channel. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)