NSW Police have confirmed a train has derailed in Richmond.

Emergency services are on the scene – reports several people are injured, with paramedics currently treating patients.

It’s understood the train hit a buffer at the end of a line, which caused it to come off the tracks.

Passengers trapped inside a train at Richmond Station after the carriage overshot a platform and struck a barricade. #9News https://t.co/teDcQNcewt pic.twitter.com/FnLJJjrCRm

— Nine News Sydney (@9NewsSyd) January 21, 2018

All passengers have now been freed and are being treated. 

RICHMOND | UPDATE: All passengers are now off the train following accident at Richmond Station. #FRNSW remain on the scene assisting @NSWAmbulance

— Fire & Rescue NSW (@FRNSW) January 21, 2018

More as we get it.