New South Wales police said the passenger train was reportedly "slowing to stop at the station" when it crashed into a buffer at the end of the line.
Initial reports suggested the train derailed, but Sydney Trains CEO Howard Collins said it was still on its rails.
NSW police said no one was trapped in the train, as was also initially reported widely.
NSW Ambulance said around 16 people were injured, with all patients that were taken to hospital in a stable condition.
The most serious injury was a suspected fractured leg, a NSW Ambulance spokesman said.
