SINGAPORE - A motorcyclist was knocked over in an alleged hit-and-run accident on Monday (March 20) morning, and police are investigating the case.

A video posted on the Facebook page of road safety community Beh Chia Lor shows a silver car in the third lane hitting the back of a motorcycle, sending the bike veering into a bus in the fourth lane.

The rider then falls to the ground and is helped up by a passer-by and the driver of the vehicle from which the video was retrieved.

The police told The Straits Times that they were alerted to the accident involving a bus, a car and a motorbike along Alexandra Road towards Telok Blangah Road, before Jalan Bukit Merah, at 8.24am.

The Singapore Civil Defence Force told ST it was alerted at 8.05am and dispatched one ambulance.

The female rider, in her 30s, was taken conscious to the National University Hospital.

Police investigations are ongoing.