(update - 15th Feb) KANSAS CITY, Mo. (AP) — The mass shooting that unfolded amid throngs of people at the Kansas City Chiefs’ Super Bowl celebration appeared to stem from a dispute between several people, authorities said Thursday.

Police Chief Stacey Graves said that the 22 people injured in the shooting ranged between the ages of 8 and 47 years old, half of whom were under the age of 16. A mother of two was also killed.