India, Nov. 7 -- Mumbai: A preliminary probe into Wednesday morning's Mumbai Monorail derailment has pointed to a combination of human error and systemic issues, officials familiar with the inquiry said on Thursday.

The incident occurred around 9.25 am on Wednesday, when a coach of a newly manufactured rake derailed during a trial run near the Wadala car depot, injuring three monorail employees.

The rake, less than a year old, had been taken out of the Wadala car depot around 8.30 am for a trial run towards Sant Gadge Maharaj Chowk (Jacob Circle). The derailment occurred when the train was moving over the "switch" on the track, which assists the monorail to shift to a parallel track.

Officials said the new monorail trains are incompati...