A spoeksperson commented: "It is with great sadness that we confirm that an accident occurred at our Pre-Stress plant in Derrylin this morning, as a result of which one of our staff members was fatally injured. The accident occurred shortly after 10am and emergency first aid was applied at the scene. Unfortunately, he passed away on the way to hospital.
"We are all extremely shocked and we extend our deepest sympathies to the family, friends and colleagues of the deceased. An investigation into the cause of the accident has commenced."
The Fermanagh County committee have led the tributes to the player. They released the following statement.
"Fermanagh GAA County Committee, County Senior Football Management Team and players are shocked and saddened to learn of the sudden death of our County Senior player and teammate Brian Og Maguire due to an accident at his work.
"We extend our sympathy to Brian Og's parents Brian and Eileen, sisters Roisin and Eimear, his entire family circle and the members of his Club Lisnaskea Emmetts at this most difficult time.
"Our thoughts and prayers are with them at this sad time.
Go ndeana Dia trócaire ar a anam uasal."