Seven people were injured in a multiple-car collision this morning along Commonwealth West Avenue, next to Clementi MRT station.

The cause of the multiple collisions was attributed to an SMRT bus, Wanbao reported.

The SMRT bus reportedly careened into the back of another SMRT bus. The resulting force sent the second bus crashing into another two cars which were in front.

The accident occurred at 8.25am this morning during the peak hour traffic.

The two cars caught in the collision were a Mercedes-Benz and another saloon of a Japanese make.

The owner of the Japanese saloon, Mrs Zhang, a 63-year-old housewife, told Wanbao that she was dropping her daughter by the road when the accident happened.

"I have been letting my daughter alight here everyday without an incident," Mrs Zhang told Wanbao.

According to Mrs Zhang, there were seven casualties in the accident. The injured were passengers from either of the two SMRT buses.

Luckily, the passengers only suffered light injuries - they mainly complained of back pains or headaches, Wanbao reported. Some passengers also suffered superficial injuries.

Among the seven, two refused to be admitted to the hospital for check-ups. The other five were sent to the National University Hospital for treatment.

The Traffic Police is currently conducting an investigation on the accident, Wanbao reported.