On Monday afternoon, independent MP Helen Haines was returning to her electorate office in the regional Victorian town of Wangaratta when she was struck by a white Toyota LandCruiser.

Witnesses have described seeing the vehicle make a U-turn, and then ram Haines against a car, before reversing and hitting her a second time.

A local barbershop owner ran to the driver’s side of the Toyota. He removed a knife from the driver’s pocket, and wrestled him to the ground.

The alleged attacker, identified as 43-year-old Tarrawingee man Brendan Nugent, was then arrested by police at the scene.

Haines was taken to hospital in a critical condition. She lost one leg in the attack.

Federal and Victorian police are investigating, and identifying potential charges. The AFP said it appeared to be an “isolated incident”, with no known threats connected to it.

Meanwhile, the head of ASIO is warning that elevated levels of grievance, intolerance and polarisation have continued to create a “permissive environment of violence”.

Today, in a special episode, columnist and broadcaster Waleed Aly on our changing attitudes to political violence, and why this moment should be a turning point for politics and for all Australians

If you enjoy 7am, the best way you can support us is by making a contribution at 7ampodcast.com.au/support.

Socials: Stay in touch with us on Instagram