Officers were called to reports of a dispute between two groups of people in Mallow Close, Eynesbury,
One group brandished weapons before making off in a grey Volkswagen Polo and a white van at about 5.30pm on Tuesday 24th March.
It is believed as the Polo was being driven away it mounted a pavement, heading in the direction of a man in his 20s who moved out of the way.
Det Sgt James Sheffield, who is investigating, said, “I am appealing for anybody who was in the area at the time and has any information to get in touch, no matter how insignificant it may seem.”