SINGAPORE - A 21-year-old motorcyclist fractured his leg in an accident involving four other cars along the Seletar Expressway (SLE) on Sunday (March 19) night.

In-car camera footage contributed to citizen journalism site Stomp by IT consultant Alex Ng shows a motorcycle travelling in the middle lane, behind a white car, at about 9.50pm.

The white car slows down abruptly, apparently to avoid another car in front of it, and the motorbike collides with the white car. A bus in the left most lane narrowly avoids hitting the rider.

The motorcyclist can be heard crying out in pain in the video and Mr Ng has to brake to avoid the motorcyclist.

"I heard the sound of the collision but I couldn't see the motorcyclist," said Mr Ng.

"Luckily, I followed the bus to the side of the road or I might have hit him too."

The police told The Straits Times on Monday that they were alerted to the accident at 9.56pm on Sunday night. It occurred along the SLE towards the Bukit Timah Expressway (BKE), before the Mandai exit.

The motorcyclist was taken conscious to Khoo Teck Puat Hospital.

ST understands that his leg was fractured.

Police investigations are ongoing.