SINGAPORE - A woman was trapped under a bus and three others were injured after a double-decker SBS Transit bus crashed into a pedestrian walkway in Bedok on Thursday (Sept 28), said the Singapore Civil Defence Force (SCDF).

The SCDF was alerted to the incident outside Bedok Residences in Bedok North Drive at 1.32pm.

According to what The Straits Times saw at the scene at around 2.20pm, the bus had crashed into a signboard and a traffic light was damaged. Parts of the front bumper of the bus appeared to have fallen off from the impact.

The road was cordoned off and traffic was not allowed to pass.

An SCDF spokesman said the woman who was trapped had to be rescued by SCDF officers using lifting equipment.

The police told ST that they were alerted to the accident, involving a bus and four pedestrians, along Bedok North Drive towards Bedok North Avenue 1, at 1.32pm.

Four people - a 38-year-old man and three women aged 33, 37 and 55 - were taken conscious to Changi General Hospital with non-life-threatening injuries.

ST understands that all four were pedestrians and had been standing at the traffic light when they were hit.

At least 20 passers-by from the nearby coffee shops had gathered outside the police cordon to watch the commotion.

Ms Tammy Tan, SBS Transit's senior vice-president of corporate communications, told The Straits Times that the bus operator was "very sorry that this has happened".

She added that SBS Transit's priority "is the well-being of the injured pedestrians".

SBS Transit has a team at the hospital and is trying to get in touch with those injured in order to extend support to them, she said.

"Meanwhile, we are assisting the police in their investigations," said Ms Tan.

"We would also like to apologise to affected commuters and motorists for the inconvenience caused."

Police investigations are ongoing.