Victoria Police have released the following statement:

"Police have arrested a man after a woman was struck by a vehicle in Wangaratta, Victoria this afternoon.

"It is understood a white Toyota Landcruiser struck the 65-year-old woman outside an office on Murphy Street at about 3.35pm local time.

"When he exited the Toyota the driver, a 43-year-old Tarrawingee man, was arrested at the scene by a passer-by. He will be interviewed in relation to the incident.

"The woman was taken to hospital with critical injuries.

"A knife was located by police and seized from inside the Toyota.

"At this stage, police are investigating as to whether this was an intentional act.

"It is not known yet if the parties are known to each other. Major Collison Investigation Unit detectives are en route. The investigation remains ongoing."

More now from Australian Prime Minister, Anthony Albanese.

He says the motive of the apparent attack is not known, but the Joint Counter Terrorism Team is involved.

Albanese calls Helen Haines "a thoroughly decent human being" and a "well-loved member of her community".

As a reminder, a man is in custody after the incident in a car park - we'll have more details on the suspect in our next post.

The family of Helen Haines has released this statement:

"This afternoon, our beloved Helen was involved in an incident outside her Wangaratta Electorate Office, and is receiving medical care.

"We thank the swift assistance of bystanders and the dedicated health workers who assisted her, and police for their response.

"Our family, and Helen’s staff, will be making no further comment at this time, and ask that their privacy be respected by the public and media. Please keep Helen in your thoughts."

We've just heard from Acting Superintendent Ashley Mason, of Victoria Police.

"We are treating this as an isolated incident at this time. There is no ongoing threat to the community that we are aware of," Supt Mason says.

An Australian MP has been hit by a car outside her office, in what Australian Prime Minister Anthony Albanese has called an "attack".

Helen Haines was reportedly in a car park near her regional office in Wangaratta, Victoria, when she was hit by a 4x4 vehicle.

This is a developing story - we'll have more details soon.