Jakarta – Police have launched an investigation after a cache of up to 10 petrol bombs was found stashed underneath a train heading to the Indonesian capital Jakarta, officials said on Tuesday.

The petrol bombs were detected on the executive train after it had departed the West Java city of Cirebon, 225 km (140 miles) from Jakarta on Tuesday morning.

"There were at least nine bottles with wicks and wrapped in black plastic attached to the train," said Suhartono, a spokesman for Cirebon operations at rail company, PT KAI.

A police officer, who declined to be named, said the petrol bombs had been removed at Jatibarang station for further investigation. Suhartono said the rail company had not received any threats.

[Reporting by Olivia Rondonuwu; Editing by Ed Davies and David Fox.]