SINGAPORE - A North South Line train travelling towards Jurong East stalled at Yishun station at 3.36pm on Thursday, creating a delay of about 15 minutes for trains in both directions, according to SMRT.

Train services were back to normal after about an hour, and SMRT had minimised the delay's impact by rerouting trains, it said in a statement.

"Station and train announcements were made to all affected commuters. We are also reviewing our processes for updating commuters via Twitter, with a view to providing even more timely updates," said SMRT's vice president of corporate information and communications, Mr Patrick Nathan.

He said the train had stalled because of a signalling fault. Commuters reported delays of around 20 minutes on various parts of the North-South Line, including at Dhoby Ghaut and Yishun.

This latest delay comes a day after Transport Minister Lui Tuck Yew said in Parliament he was "most upset" with the multiple rail disruptions in recent weeks. Between Feb 17 and March 3 there were seven incidences of rail disruptions on the MRT system.

A fire on Monday also led to the Bukit Panjang Light Rail service being shut down for nearly 24 hours.