Two SBS buses collided along Sims Avenue yesterday afternoon, leaving 23 passengers with minor injuries such as cuts and bruises.
Service 80 - a single-decker bus - crashed into double-decker Service 21 at the slip road of the junction of Sims Avenue and Sims Way, towards Geylang, at about 5.30pm.
A Singapore Civil Defence Force spokesman said all 23 passengers were conscious and were taken to Tan Tock Seng Hospital.
Investigations by the Traffic Police into the crash, which shattered the single-decker bus' windscreen, are ongoing.
SBS Transit's senior vice-president for corporate communications Tammy Tan said the operator is also investigating the accident.
"Our priority has been the well-being of the passengers who were injured on the two buses," she said. She added that SBS has sent its staff to the hospital to "extend care and concern and render assistance as best as we can".
"We extend our deepest apologies to all affected passengers for the distress and inconvenience caused," she said.
The last reported accident between two public buses occurred last year on Nov 8.
An SBS bus was attempting to pass a taxi that had stopped in the bus lane on Sims Avenue East near Jalan Eunos when SMRT service 67 collided with it. Five casualties were taken to Changi General Hospital.