ELIZABETH Quay train station was evacuated this afternoon, causing commuter chaos as Perth neared peak hour.
Transperth warned people they could still expect delays as they embarked on their trips home from work.
Police attended the station after reports of two men entering a tunnel carrying a suitcase and a backpack.
But it appears the bags contained only rubbish.
The station has now reopened.
Services on the Mandurah and Joondalup lines were delayed, and travellers were being urged to allow extra time for their trips.
Some commuters took to Twitter to vent about their delay.
What’s going on in the underground or Elizabeth station? Trains stuck at Glendalough and we aren’t going anywhere soon @Transperth
— Frances (@developit) August 23, 2017
Hey @Transperth why don’t you tell all the passengers at Elizabeth Quay why their train is not coming? We’ve been waiting a while now.
— abartlett (@tinbrick) August 23, 2017
@Transperth So can you tell us what the hell is going on with the Mandurah line since your staff can’t?
— Scott Rose (@Faithmelter) August 23, 2017
Trains on the Mandurah and Joondalup lines are currently experiencing delays. We appreciate your patience.
— Transperth (@Transperth) August 23, 2017