Commuters can expect delays following news that a person has been struck by a train at Harris Park.
The T2 and T1 line Twitter accounts have advised passengers to allow additional travel time.
The incident is understood to have occurred on the Western Line.
The CityRail website has posted the following message.
"Passengers catching trains on the T1 Western, T2 Inner West & South and Blue Mountains lines are advised to allow plenty of additional travel time due a fatality at Harris Park. Passengers should also listen to announcements and check indicator boards."