Three people were injured in an accident involving three vehicles in Woodlands Avenue 12 on Thursday morning.
The Singapore Civil Defence Force (SCDF) said the injured have been moved to Khoo Teck Puat Hospital. Police said the accident was reported at about 7 in the morning.
Eye-witnesses who spoke to TODAY said they saw an overturned lorry on the Seletar Expressway (SLE) and a car across the road divider.
Road users reported a massive traffic jam on the highway.