A private bus veered off a road and hit a tree before toppling over at the National University of Singapore's Kent Ridge campus on Tuesday morning.

Of the six people on board, a 41-year-old woman complained of back pains and was taken conscious to the National University Hospital for outpatient treatment. Police are investigating the incident which took place at about 8.45am.

The ComfortDelGro shuttle bus is said to have been negotiating a bend along Kent Ridge Crescent when the driver lost control of the vehicle, causing it to mount the road kerb and roll down a grassy slope. The Straits Times understands that the bus eventually hit a tree at the foot of the slope and toppled on its left.

ComfortDelGro's group corporate communications officer Ms Tammy Tan, said of the injured passenger: "We are in contact with her and will be rendering her assistance while she recuperates. We are meanwhile assisting the police in their investigations."