SINGAPORE - Train services on the North-South and East-West Lines were affected by two track faults on Tuesday (Aug 2).

The first, which occurred on the East-West Line (EWL) at 8.45am, caused a one-hour service disruption between Joo Koon and Boon Lay stations.

Free regular bus and shuttle bus services were activated to serve affected commuters.

Apologising to affected commuters, SMRT's vice-president for corporate information and communications Patrick Nathan said in a statement that the EWL disruption was due to the loss of power to track side signalling equipment.

"This caused two west-bound trains to be held between Pioneer and Joo Koon stations. Our power engineers were quickly deployed to restore power to the affected stretch and service resumed at 9.40am," he added.

"SMRT is still investigating the cause of the power fault."

The second track fault on the North-South Line, which SMRT said was unrelated to the EWL fault, occurred at about 8.55am.

SMRT had first tweeted for commuters to expect an additional 10 minutes of travelling time between Yishun and Woodlands stations.

Mr Nathan said the delay was caused by a track point failure near Admiralty Station.

He explained: "As a precaution, trains were travelling over the affected point at slower speeds to ensure the safety of our passengers."

While SMRT subsequently tweeted at 9.19am that normal service on the NSL had resumed, commuters continued to complain of delays along the line throughout the morning and afternoon.

In a tweet at 1.25pm, it said to expect an additional 15 minutes of travelling time from Ang Mo Kio to Admiralty (in the direction of Jurong East) as its engineers were still attending to the track fault.

Normal service on the NSL eventually resumed at 1.47pm, tweeted SMRT.