UPDATE: Trains on the Joondalup and Mandurah lines are running again but not to the regular schedule.
The delay is being caused this morning due to a medical emergency.
Transperth declined to release further information surrounding the emergency but reported though running delayed trains may not connect with other timetabled services.
PREVIOUS: Transperth is warning commuters to expect delays on the Joondalup and Mandurah lines this morning.
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READ NOWThe delay is stated to be due to a medical emergency on board a service.
More to come.