There were no passengers in the coaches at the time. Images showed one of the coaches completely destroyed in the fire.
Officials suspect a short-circuit might have caused it.
Earlier this year, in a near miss involving the monorail, two trains in opposite directions nearly collided head-on after ending up on the same track near Chembur. The trains were stopped before a disaster could take place.
Follow NDTV for latest election news and live coverage of assembly elections 2019 in Maharashtra and Haryana.
Subscribe to our YouTube channel, like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.