If you use the suburban local train service on the Central railway, and was late for work, here's what happened.

A Kalyan-bound local train derailed near the Masjid station this morning, disrupting rail traffic on the suburban section of Central Railway. The train, which had started from the CST station, was approaching the Masjid station, when the sixth bogie (from the engine) derailed, railway sources said.
Efforts are on to restore the traffic, they added. The incident occurred in the morning rush hour, inconveniencing thousands of commuters. No casualty was
reported.