A World Trade Center security guard accused of stabbing a man outside a fast-food restaurant while he was on duty has been arrested.

The New York Police Department says the stabbing occurred at around 4 a.m. Monday outside a McDonald's. The McDonald's isn't far from the World Trade Center.

The 20-year-old victim was treated at a hospital. His injuries aren't believed to be serious.

Authorities say the two stepped outside after having a dispute inside the restaurant.

Police say the guard was on-duty at the time.