Officers last night (Wednesday) arrested a 59-year-old woman, from Knossington, on suspicion of attempted wounding with intent.
She has since been released under investigation.
The vehicle involved in the collision – a grey Mercedes - has also been recovered by police.
Det Insp Charles Edwards said: “Our investigation into the incident is continuing and we’ve spoken to a number of witnesses who were in the area at the time.
“I’m aware of the concern this incident has raised and we’ll provide further updates as our enquiries progress.”
The victim’s injuries were not life-threatening or life-changing. She has since been discharged and officers are in regular contact with her.
You can pass on information to police by clicking HERE and quoting reference 22*623684 or calling 101.
Northants Hunt Saboteur Hit by car whilst monitoring the Cottesmore hunt, An investigation has begun after the woman was struck by a car in Knossington.
WARNING SOME PEOPLE MAY FIND THE CONTENT OF THIS VIDEO UPSETTING