A Mumbai local train derailed on the harbour line of the Central Railway at the Chhatrapati Shivaji Maharaj Terminus (CSMT) in Mumbai on Wednesday afternoon, an official said.

Central Railway chief spokesperson Dr Swapnil Nila said, "Two wheels of an empty rake while doing trial after attending the defective spot got derailed near CSMT. Local trains between CSMT and Wadala Road are affected. Inconvenience is deeply regretted."