java

At least 38 others, many of them teenage boys remain trapped under the Al Khoziny Islamic Boarding School in the East Java town of Sidoarjo.

The majority of cases occurred on the island of Java.

"The babies were first housed in Pontianak and had their immigration documents arranged before being sent to Singapore," West Java Police's director of general criminal investigation, Surawan, told BBC News Indonesia.

The vessel's route is often used by locals going between the islands of Java and Bali.

Five months before that, a 737 Max operated by Lion Air crashed into the Java Sea shortly after take-off from Jakarta, Indonesia.