MRT service between Tanah Merah and Pasir Ris stations was disrupted for over an hour on Wednesday night after a train captain "bypassed a signal point without authorisation", train operator SMRT said in a statement on Thursday.
The train captain's action caused a "trackside fault" to develop, at 10.12 pm. "Safety measures kicked in and as a result, train service was disrupted between Tanah Merah and Pasir Ris stations," said SMRT.
SMRT engineers were deployed immediately to rectify the fault. About 180 passengers were re-routed to Simei station and another 200 to Expo station. Free bus bridging services were provided, and train service resumed at 11.19pm.
SMRT said that investigations were underway, adding: "SMRT takes a serious view of any breach of operational protocols and disciplinary action will be taken as necessary." It also apologised to all passengers inconvenienced by the disruption to train services.
"The two trains were re-routed to Expo and Simei MRT stations as a safety precaution. We would like to reassure all passengers that the overall safety of the system was maintained throughout." said SMRT.