Queensland's transport minister has apologised to commuters who have been impacted by major peak-hour delays on all 13 Brisbane rail lines.
Jackie Trad said it was a "large network and on occasion, things go wrong".
"But can I just apologise to all the commuters," she told Seven News on Tuesday.
Train travellers were first informed of the delays about 4.45pm.
Queensland Rail chief executive Nick Easy said a "points issue" at Roma St station about 4.30pm was to blame for the chaos.
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"Trains are continuing to run through the CBD, however as QR works to rectify this issue and divert trains around Platform 8 on altered lines, some customers may experience delays between 10-30 minutes," he said in a statement.
"We thank our customers for their patience."
There were initially delays of up to 45 minutes affecting all lines across the city.
