Emergency crews are on the scene, and at least three ground ambulances and an air ambulance have been dispatched to the scene as well.

Cowboys spokesman Brett Daniels said the accident happened while workers were in the process of assembling the crane. A cable on the crane broke causing the crane to fall and crash into one of the workers. Arlington firefighters on the scene say he’s in critical condition and and air ambulance was dispatched to take him to Baylor Hospital in Dallas.

No status was given for the other two workers that were injured in the crane collapse. Emergency crews are still on the scene attending to the other two injuries. A full investigation will take place to determine the actual cause of the crane collapse. There was no report as to damage to the stadium from the falling crane.