The first derailment on the relatively new Belapur-Kharkopar section occurred on Tuesday when three coaches of a local train moving at 15 km per hour derailed, throwing the entire section out of gear. No one was injured. Of the 27-km Belapur-Uran section, the 12-km Belapur-Kharkopar section was opened to the public in November 2018. The remaining stretch will be inaugurated later this month. The incident occurred around 8.46 am as the train's speed was being lowered as it approached Kharkopar station.

While the cause of the derailment is not clear, sources said that given the impact of the derailment, either the train was probably over-speeding or there are issues with the track geometry. A detailed inquiry has been ordered by the Central Railway (CR) headquarters. In an statement, CR officials said that the coaches from the front (motorman-end) of a Belapur-Kharkopar local train derailed while entering Kharkopar station.