Five people were injured in a four-vehicle crash that included a bus on Sukhumvit Road in Bangkok on Wednesday morning.

The accident occurred on the outbound lane of Sukhumvit Road in front of True Digital Park in Phra Khanong district about 6.40am.

Eyewitnesses said a Mitsubishi Pajero swerved repeatedly across the road before hitting a school-bound Chevrolet car with a family of three aboard and colliding with a bus carrying about 30 passengers.

The driver of the bus lost control and it mounted the footpath and hit a power pole. The Mitsubishi also hit a motorcycle.

A bus passenger, two street sweepers, the driver of the Mitsubishi and the mother driving her children to  school were injured and taken to hospital.

The driver of the Mitsubishi, identified only as Saharat, 37, apologised and said he dozed off. He promised to take responsibility.

It took about three hours to move the damaged vehicles from the crash scene. Police said they did not test the Mitsubishi driver for alcohol at the scene because he was injured. He would be given a blood-alcohol test at the hospital.