SINGAPORE - Four people were injured after a SBS Transit bus, tipper truck and a trailer collided into one another on Tuesday morning.
The police said that the bus driver, two passengers from the bus, and the trailer driver were taken conscious to Khoo Teck Puat Hospital.
The drivers had to be extricated using hydraulic rescue tools by the Singapore Civil Defence Force (SCDF). They were rescued within an hour.
Police said the incident happened along the Seletar Expressway towards the Bukit Timah Expressway near the Yishun exit.
The police and the SCDF said they received calls alerting them to the incident at about 10.20am.
A snaking traffic jam in the area took at least three hours to clear after the crash.
Police investigations are ongoing.