Police ram car into mentally ill dad before officer stomps on head leaving him in coma

A father-of-three is in a coma after he was hit by a police car and allegedly kicked in the head by an officer as he was arrested in Melbourne, Australia.

A shocking video shows the 32-year-old man with mental health issues walking in the middle of a road, before he is approached by a marked police car.

The car can be seen driving into the man, who is thrown up on to the bonnet for a few seconds, before hitting the floor.

Six police officers can then be seen pinning the man, who has bipolar, to the ground at around 4.10pm.

It is alleged that one of the policemen then kicked the man in the face.

The dad was said to have been waiting for a mental health bed at the Northern Hospital but decided to leave after waiting more than a day in emergency.

Hospital staff called police to bring him back, but the violent arrest unfolded and he was left needing to be placed in an induced coma.

The man's father Glen told 9News told he was devastated by the incident, as his son suffered from bi-polar disorder.

He told reporters the officers "could've killed him. It's disgusting."

Dad Glen said the family are not allowed to see his son, and it will take days for doctors to determine whether he has sustained any permanent brain damage.

He added that his son, who runs a successful business and just finished building his dream home, had not suffered from a mental health episode in nine years.

One eyewitness called George told Nine News the man was tackled to the ground by police and kicked "repeatedly".

"They've kicked him in the head repeatedly whilst they also had five police officers who already tackled him to the ground," he said.

Other eyewitnesses filmed the incident in a nearby car, while watching the arrest unfold in horror as sirens blared.

"Am I witnessing this? What the f**k" one witness can be heard saying.

"Are you f***ing kidding me," another person yells from inside the car.

A witness yelled "you've got his head" as officers pinned the man down on the traffic island.

Victoria Police confirmed they attended the scene following reports of a man behaving erratically.

A spokeswoman said: "During the highly dynamic incident a police officer was assaulted and OC spray was deployed before the man was arrested and subsequently taken to hospital for assessment.

"Upon arrival the male allegedly became aggressive and damaged a police vehicle while attempting to avoid arrest."