The freight train was blocking the line near Manurewa.
TRAIN DISRUPTIONS
Please expect delays and cancellations to Southern line services due to a broken-down freight train near Manurewa blocking the line. Updates to follow. pic.twitter.com/JBiJiupXxD
It's the fourth time this week the train schedules have been impacted. Yesterday a signal fault near Middlemore Station affected trains on the southern line at morning rush hour. Trains were also delayed or cancelled in the morning after a trespasser was spotted on train tracks.
On Tuesday a fault on a train caused issues for those travelling between Pukekohe and Papakura.
And on Monday a tree brought down in bad weather over tracks near Britomart meant services to the west and south were affected.