A disabled woman was pushed to the ground following an argument in Retford.
Police were called to Rectory Road at 1.20pm on Monday.
The victim was in a car when the driver of a silver Mercedes, registration number KK07DFZ, drove alongside her.
The driver and one of the passengers in the car threatened her and when she got out of her vehicle she was pushed to the floor.
She was taken to hospital after suffering injuries to her hand.
Police would like to speak to the three men who were in the Mercedes at the time.
The driver was described as white and in his early 30s, tall and of a stocky build. He had short cropped hair and a goatee beard.
One of the passengers is described as white, in his late 20s, about 5ft 10ins tall, stocky with short cropped hair and a North East accent.
If you have information that could help please contact police on 101 or call Crimestoppers anonymously.