SINGAPORE - Two men were headed for Woodlands Checkpoint on Monday (July 24) when their motorcycle crashed into the back of a car which had stalled on Seletar Expressway (SLE).

The rider, Mr Danny Raj Muniappan, 24, and his pillion, Mr Trivikram R L, 21, had just ended their shift at Changi Airport, where they work as Certis Cisco officers, when the accident happened around 10.30am before the Lentor Avenue exit.

Graphic videos of the accident circulating online show the two Malaysians flung off a green motorcycle after they crashed into the stationary white sedan on the highway. The boot of the car was open, with the hazard lights turned on.

In one of the videos, the pillion rider is seen flung into the air before landing several metres away from the car.

Both men were taken to Khoo Teck Puat Hospital with severe injuries, said the rider's father, Mr Muniappan Govindaraju speaking to The Straits Times on Wednesday at the hospital.

He said the two are good friends and rent a home together in Johor Baru.

"When you watch videos like this online, you normally have no feelings because it's of other people. But I can't take it because it's my son," said Mr Muniappan who saw the video on Facebook on Wednesday.

"My son isn't the racing-type or action-type. We don't know what happened because we haven't been able to speak to him."

The 55-year-old who runs a chendol business in Selangor, said doctors told him his son suffered a ruptured bladder, a fractured pelvic bone and lost a lot of blood. He also broke his left arm and left leg - in two places each - and has been unconscious since Monday's accident.

Pillion rider Mr Trivikram also suffered a fractured pelvic bone and a broken leg. He has been in and out of consciousness and has not been able to speak. Both are still warded in the intensive care unit.

"My son (Danny) isn't in very good condition, the doctors are doing all they can, now only God can help us," said Mr Muniappan who drove four hours into Singapore with his wife and older son immediately after hearing about the accident.

"Doctors told me that they will wait until next week to operate because Danny has some swelling and blood clots in his brain," he added.

Mr Danny is the youngest of three children and has been working in Singapore for about five years. He bought the motorcycle six months ago and used it to commute between Malaysia and Singapore, said his father.

Said Mr Muniappan: "We're not concerned about medical bills right now, all we want is for Danny to open his eyes and his condition to stabilise soon."

Certis Cisco said it will extend help to them and their families.

"Some of our staff have visited them at the hospital and will keep in close contact with them for updates on our officers' injuries," said Mr Benny Lim, senior vice president and head of Certis Cisco aviation security.

Eyewitness to the accident, Mr Manster Wirman, 36, a sideloader operator at Jurong port, was on the way to JB with his family on Monday when he saw the incident.

He said: "I helped in clearing the obstacles on the road but did not dare to touch (one of the injured riders) in case I injure him further."

The Singapore Civil Defence Force said they dispatched two ambulances to the accident scene.

Police investigations are ongoing.