There are reports a trespasser is on the tracks and disrupting morning train services on Auckland's western line.
Auckland Transport has warned commuters of delays, but blamed "an earlier train fault" for the disruption at the Glen Eden station.
However, frustrated train passengers posted on social media that a person was responsible for the delays.
Tim Redmond tweeted: "A "passenger incident" at Glen Eden. Eastbound trains before Glen Eden are at a standstill."
SM Morgan said: "Up for a swim at 6, now been at station for 20min - trespasser at Glen Eden, all trains to Britomart delayed. Could have been sleeping!!!"