Shots have been fired at a vehicle in the car park of a McDonald's restaurant, police said.
Humberside Police said a 999 call was made at 11.35am on Saturday by a member of the public reporting a number shots being fired at St Andrews Quay, in Hull.
A spokesman said a blue Volkswagen Golf car with two people inside was hit.
He said the vehicle's windows were blown out by the shots.
The spokesman said a member of the public received treatment at the scene for shock and the passengers in the car were unhurt and are assisting police with their inquiries.
He said: "An outer cordon has been put in place around the scene of the firearms incident and firearms trained officers, the police helicopter, specialist police dogs and many other supporting departments of the police are in attendance, tracking down the offenders."
He said the suspects were travelling in a grey Volkswagen Golf.
They made off from the scene, passing the Asda supermarket on Hessle Road, travelling in the direction of Gipsyville.