The chairman of Cianbro Corp.’s board of directors has been indicted on several charges in connection with the firing of a small cannon at a Maine Maritime Academy football game.

The Bangor Daily News reports MMA alumnus Peter Vigue was indicted Thursday on charges of aggravated assault, reckless conduct with a firearm and discharging a firearm on a school property.

The 72-year-old Vigue brought the cannon to the game and fired it after MMA scored, a school tradition.

A wad of an unidentified substance was fired from the cannon and struck a referee in the head.

The ref was taken to the hospital but did not suffer life-threatening injuries.