Train services along the East-West Line from Bugis to Aljunied were disrupted after a person who entered the track was killed.
A train fault encountered at Fajar LRT station caused services on the Bukit Panjang LRT to be disrupted on Monday evening.
17 stations on the East-West Line, from Tiong Bahru to Tuas Link, will close earlier on Fridays and Saturdays from 8th to 31st December.
Train services were either delayed or down intermittently on the East-West Line from 5:33am on Friday, 23rd December.
There is no train service between Yishun and Yio Chu Kang MRT stations due to a train fault, SMRT reported at 4:01pm.
Free bus services were made available islandwide after train service on the North-East Line was disrupted for two hours on Monday morning.
Senior Minister of State for Transport Josephine Teo said during Parliament that trunk bus services will be ramped up during MRT disruptions.
A stalled train between Tai Seng and Bartley stations on the Circle Line caused a service delay for commuters heading towards HarbourFront.
Minimising train disruptions during morning peak hours must be a top priority for both rail operators said Transport Minister Lui Tuck Yew yesterday.
The service disruption on the Downtown Line on Friday, which affected 1,700 commuters, was caused by a power fault at the Operations Control Centre.
Train service was disrupted on the North-South Line on Tuesday night, just one day after a 50-minute delay during the morning rush hours.
Rail operators, SMRT and SBS Transit, will be slapped with heftier fines in future when their train service faces a large scale disruption.
SMRT explained the causes of three recent disruptions on its train lines - two due to human error, and the other down to equipment failure.
Transport Minister Lui Tuck Yew has voiced concern over the series of rail incidents, and has requested for updates on investigations.
Train service between Tampines and Tanah Merah was disrupted on Wednesday night due to a track fault, but was recovered within 1.5 hours.
Train services on Bukit Panjang LRT were disrupted for an hour on Sunday morning due to a power fault that occurred between Fajar and Bangkit stations.
A train fault on the North-South Line occurred on Monday morning, causing up to 20 minutes delay in services between Sembawang and Marina Bay.
Train services on the North-South Line, between Kranji and Yew Tee stations, were disrupted for about one and a half hours on Saturday afternoon.
Train service on the Circle Line, between Stadium and HarbourFront stations, was disrupted on Wednesday night at around 11:00pm.
An electrical failure on the North-South Line was caused by a lightning during Sunday morning's thunderstorm, which led to a 35-minute delay.