UPDATE: A small fire in a stairwell has been extinguished. Firefighters are ventilating the centre. Approximately 250 people self-evacuated.
Westfield Parramatta is being evacuated to reports of smoke on two separate levels.
Fire crews are yet to work out the cause of the smoke, which has been reported on the second and fifth levels of Myer.
Six fire trucks are on their way to the shopping centre on Campbell Street.
More to come.