Helen Haines still in hospital as attack suspect named: What we know so far

Key points

• Independent MP Helen Haines is in a critical condition in Melbourne after a four-wheel drive allegedly struck her outside her Wangaratta office on Monday afternoon. A 43-year-old man from Tarrawingee was arrested at the scene and is being questioned by police.
• Counterterrorism authorities have joined Victoria Police in the investigation, and the motive is not yet known.
• Prime Minister Anthony Albanese called a bystander who restrained the suspect a hero, and political leaders have condemned the attack.