Police in Warsaw are investigating a stabbing at at McDonald’s restaurant.

Officers were first called, on Monday, Nov. 7, to the Kosciusko County Justice Building for a reported stabbing, but it was determined that the attack had taken place at the McDonald’s in the 300 block of N. Detroit St. and the victim drove himself to the Justice Building.

Video showed an argument take place on the west side of the restaurant between the victim and the suspect, which turned physical, and resulted in the victim being stabbed with what is presumed to be a knife.

Police say that the victim, a 46-year-old Warsaw man, knew the suspect, believed to be John Robertson. Robertson is 48 years old, 5 feet, 11 inches tall and 169 pounds. He is reportedly homeless and believed to be armed.

Anyone with information is asked to contact Central Dispatch at (574) 372-9511.