SINGAPORE - A track fault caused delays that lasted for more than an hour on a north-bound stretch of the North-South Line (NSL) on Wednesday (Aug 23) morning.

SMRT said in a tweet at 7.32am to expect delays of up to 15 minutes - later revised down to 10 minutes - from Yew Tee to Jurong East stations.

It added that the fault was not linked to its new signalling project.

In a subsequent tweet at 7.55am, SMRT advised commuters travelling towards the Central Business District to take the south-bound train towards Marine South Pier, citing congestion towards Jurong East from Woodlands.

Normal train service resumed at around 8.50am.

Engineer Fu Yan, 30, said it took him about five minutes more to get from Choa Chu Kang station to his workplace in Jurong East, but this was "no big deal."

"There have been worse breakdowns," he said.

The NSL was beset by delays for two days last week. The 30-year-old line suffered a two-hour delay during evening peak on Aug 17 due to a fault with the new signalling system near Ang Mo Kio.

The following morning, a defective train radio added travel time of up to 45 minutes between Marina South Pier and Sembawang, affecting officer workers and students trying to get to school during examination season.