Pictured: The man accused of hitting two cops with his car while texting

A young Sydney driver is accused of texting behind the wheel when he allegedly ploughed his car into two police officers leaving one with life-altering injuries.

Jakob Thornton, 22, was allegedly using his mobile phone when he approached a random breath test site on Campbelltown Road on Friday evening.

Distracted as he drove home from work, he allegedly careened into Senior Constables Matthew Foley and Jonathon Wright, pinning the officers against their own car.

Jakob Thornton told officers he had been texting at the time of the crash. Source: 7 News
Jakob Thornton told officers he had been texting at the time of the crash. Source: 7 News
He has been refused bail in part due to his previous driving record. Source: 7 News
He has been refused bail in part due to his previous driving record. Source: 7 News

One of the officers sustained a serious fracture while the other had part of one of his legs amputated.

The officer's injuries were so severe a surgeon was flown in to assist while other officers acted quickly to stop their critically injured colleague bleeding out.

"The first aid that was provided by police at the scene has gone a long way to saving this police officer's life," Insp. Michael Mills of NSW Ambulance said.

One of the officers lost part of one of his legs in the incident. Source: 7 News
One of the officers lost part of one of his legs in the incident. Source: 7 News

Police have declared the incident as critical meaning a special team of investigators will now take over the scene.

It will be their job to establish exactly what happened with their findings then subject to an independent review.

Thornton's vehicle was evidently damaged following the collision. Source: 7 News
Thornton's vehicle was evidently damaged following the collision. Source: 7 News

Thornton was refused bail in court on Saturday with the magistrate convinced there is a risk he will get behind the wheel again.

"Your client told officers he had his head down texting for 10 to 20 seconds at 60km/h before crashing", Magistrate John Favretto said.