Jakarta: At least nine workers died as an explosion hit a coal mine in  Indonesia's western province of West Sumatra on Friday, media reports said.

The mishap left two people injured.

The explosion in the mine in Sawahlunto town occurred at about 8:30 am local time, Arief Pratama press officer of the provincial search and rescue office, told Xinhua news agency.

"Nine people were killed by the blast. Two others sustained serious wounds," Pratama said.

Rescue operation is currently underway.

The injured people were shifted to hospital for treatment.