KULAI, April 14 -- A passenger on the express bus said he felt compelled to intervene after witnessing the driver allegedly carrying on inappropriate behaviour while the vehicle was in motion.

The man, who only wished to be known as Siva, 40, told Harian Metro that he later lodged an online report after seeing a woman sitting on the driver's lap while the bus was being driven.

"If I had not acted, the bus driver might not have realised the mistake, which could have led to an unwanted incident," he was quoted as saying.

Siva, a Kulai resident, said he was alarmed by the situation as it could have endangered all passengers on board.

"I felt the act could lead to problems and compromise passenger safety. What would happen if something un...