Police were called after two men were reportedly spotted with knives in Friargate at around 9.23pm on Wednesday (April 13).
Officers said they discovered a man had been struck by a car when they attended the scene.
“He was taken to hospital with minor injuries,” a spokesman for Lancashire Police added.
A 20-year-old man from Swindon and a 34-year-old man from Wigan were subsequently arrested on suspicion of affray.