Melbourne rail services back on track

Melbourne train services have resumed following a blaze that threw services into chaos.

New cabling has been installed by rail operator Metro and the four lines which were still experiencing major delays during Wednesday evening's peak hour are back to normal.

A Metro spokeswoman says there has been a very small number of cancellations, but otherwise services have resumed to normal on the Frankston, Cranbourne, Pakenham and Sandringham lines.

Fire near Richmond Station on Tuesday evening threw services into chaos for commuters, leaving thousands stranded in the CBD.

Four lines were still experiencing major delays during Wednesday evening's peak hour with city loop passengers on the Frankston, Cranbourne, Pakenham and Sandringham lines being asked to travel to Flinders Street station by foot or tram.

The fire damaged telecommunications equipment which controls signalling.