Pelabuhan Ratu in Sukabumi, West Java, Indonesia. Photo: Google Maps

Twenty-one people were killed and several injured when a bus fell into a ravine in Java, Indonesia, on Saturday. The bus carrying 37 people was headed to a holiday spot in Sukabumi region in West Java when it sped downhill and lost control before falling into a ravine 10 meters deep, Channel News Asia reported.

According to Galih Bayu Raditya, head of the traffic unit at the local police precinct, 21 of the 37 people died in the crash while the rest were injured. The injured were taken to several local hospitals.

“We believe the accident happened because the brakes failed,” Raditya said.

The bus was part of a four-bus tour from Jakarta headed to a rafting spot in Pelabuhan Ratu, Sukabumi. Passengers from the other buses saw smoke coming from the bus before it started the journey.

Police said the bus’s road-worthy certificate expired in 2016. Authorities had repeatedly warned that the route where the accident occurred was not suitable for buses because of the narrow road and multiple tight corners.