A new video of the accident involving a bus and multiple motorcycles, which occurred along Pasir Panjang Road on July 20, has surfaced online.
The bus captain has since been suspended, SBS Transit told Stomp in a statement.
It was earlier reported that the incident took place at close to 11am and left three men injured. They are aged between 23 and 39, according to the police.
The trio, two motorcyclists, and one pillion rider, were conveyed to the National University Hospital (NUH), the Singapore Civil Defence Force (SCDF) told Stomp.
Stomp contributor Edros had shared with Stomp a video that was taken at the scene, showing the aftermath of the collision.
Facebook page Beh Chia Lor - Singapore Road has now uploaded a second video of the accident itself and tagged Stomp in its post.
In the clip, the bus can be seen moving off and running over four motorcycles in its path while the traffic light was still red.
The video has sparked numerous comments from netizens, who are speculating over what caused the bus driver's actions.
Police investigations are ongoing.
In response to media queries by Stomp, SBS Transit's senior vice-president for corporate communications Tammy Tan said:
"Our priority is the well-being of the two injured motorcyclists and a pillion rider.
"We were at the hospital that day following the incident and all three of them received outpatient treatment. We will continue to render assistance to them as best we can.
"We apologise to affected commuters and road users for the distress caused.
"Meanwhile, we are assisting the police with their investigations and the Bus Captain has been suspended pending findings."