SINGAPORE, June 12 — Commuters starting their work week this morning were frustrated by train delays during the morning rush hour, due to signalling faults along the North-South Line.

SMRT told commuters via its Twitter feed around 9.20am to add 20 minutes to their commute if they were travelling between Choa Chu Kang and Jurong East stations.

About 30 minutes later, SMRT announced that the delay had been cleared, with trains progressively returning to normal speed.

Passengers took their grievances to Facebook, stating they were stuck in stationary trains.

Facebook user Janet Soh said that she was stuck in a train for 30 minutes.

Janis Zhang mentioned in her Facebook post around 9.20am that trains were delayed at the Bukit Batok MRT station for "more than half an hour”. 

SMRT announced around 9.50am that trains had returned to normal speeds, about half an hour after it first announced the delays. — TODAY