The accident occurred on a track crossover point right outside the Wadala depot when the monorail rake was being taken out for signalling trials.
An empty coach of a newly procured monorail train derailed and hit a beam during a test run at Wadala depot in Mumbai on Wednesday morning, leaving three staffers, including the train captain, injured and causing severe damage to the carriage, officials said.
There were no passengers on board the train when the incident took place, they said.
While Maha Mumbai Metro Operation Corporation Ltd (MMMOCL), which operates the monorail, called it a “minor incident” and maintained nobody was injured, a civic official said three monorail employees suffered injuries and were treated at a hospital.
Regular monorail operations in the metropolis had been suspended on September 20 until further notice for system upgrade work in the wake of recurring technical glitches.
In photos and videos shared on social media, the train appeared slightly tilted. The first coach of the train hit the track beam, and its nose tossed in the air, and the rear portion of the coach tilted, which was removed from the track with the help of a heavy-duty crane in the evening, they said.
The accident was reported around 9 am. Two crew members were safely rescued from the monorail, a fire brigade official said.
The officials said the accident occurred on a track crossover point right outside the Wadala depot when the white-coloured monorail rake was being taken out for signalling trials.
An engineer of the company involved in the trial was accompanying the train captain and some other staffers, who were travelling to the nearest stations after signing off their duties, they said.
The first coach’s undergears, coupling, and bogies suffered major damage, along with the covers on the wheels, the officials said. From beneath the corridor, the train appeared stuck between two beams, with one side hanging in the air.
In a monorail system, the bogie or carriage sits below the elevated beam, carrying the wheels and suspension that guide and support the train along the beam.
#WATCH | Mumbai: Maha Mumbai Metro Operation Corporation Ltd. (MMMOCL) is conducting a series of advanced system trials and tests as part of its ongoing technology upgradation program. During one of these routine signalling trials, a minor incident occurred. The situation was… pic.twitter.com/zlCwdVbKPd
— ANI (@ANI) November 5, 2025
MMMOCL has procured 10 four-coach monorail trains from Medha SMH Rail Pvt Ltd at Rs 55 crore each.
“During one of these routine signalling trials this morning, a minor incident occurred. The situation was immediately brought under control, and no injuries were reported to any staff or personnel,” the operator said.
The operator said the communication-based train control signalling technology is being tested on the monorail system, which is being implemented by Medha SMH, the designated contractor for the project.
The exercise was carried out in a fully protected environment, strictly adhering to all safety protocols, the MMMOCL said.
“These trials are designed to simulate extreme or worst-case scenarios to evaluate system responses and ensure complete preparedness before actual deployment. Hence, such controlled situations are a part of the standard testing process,” said the statement, adding regular trials on the mass-transit system will remain unaffected.
Mumbai Metropolitan Region Development Authority (MMRDA) had set up a committee to conduct a detailed inquiry into the technical glitches that affected monorail services multiple times in the recent past, including the major disruption that occurred on August 19, when hundreds of passengers were stranded in two monorail trains at different locations.