Mojokerto police Chief Prasetijo Utomo said both drivers were killed in the accident, which occurred in Mojokerto district at 03:30 am (2030 GMT).

"The majority of the victims, 17 of them, were inside the minibus. One of the victims is a seven-year-old girl," Utomo said.

"We suspect the bus and the minivan were speeding. And the minivan was over capacity, it should have seated 10 people."

Indonesia has a poor road safety record with drivers frequently flouting the law.