SINGAPORE - Two men were trapped in a lorry after a chain collision on the Ayer Rajah Expressway (AYE) on Thursday morning (Feb 1).

The Singapore Civil Defence Force (SCDF) said it was alerted to the road traffic accident at around 10.30am.

The police said that the collision, which involved four vehicles, occurred on the AYE in the direction of the Marina Coastal Expressway (MCE), after the Jurong Town Hall road exit.

Two tipper trucks, a trailer and a lorry were involved in the accident, which caused traffic to build up for more than an hour on the expressway till the Buona Vista exit.

A video posted on Facebook showed the four vehicles occupying the leftmost lane. A recovery vehicle and an ambulance were spotted at the scene.

In a tweet at around noon, the Land Transport Authority told motorists to avoid lanes 2 and 3.

SCDF said that the two men were trapped in one of the vehicles and they had to be extricated by officers using hydraulic rescue tools.

Both were conscious when taken to Ng Teng Fong General Hospital.

It is believed that the lorry driver, a 56-year-old man, had an open fracture on his left leg.

His passenger, who is understood to be a 33-year-old man, suffered minor leg injuries.

Police investigations are ongoing.