Train service between Raffles Place and Marina Bay stations on the North-South Line was disrupted by a track fault Wednesday afternoon.
In a tweet at around 3.15pm, operator SMRT said there was no train service between those two stations in both directions due to a track fault.
At around 3.30pm, it said service had resumed but trains would be travelling slower.
The operator said in a tweet around 3.50pm that train services between both stations are now operating normally.