Firefighters battling a structure fire at Addison Airport

Multiple Addison FD firefighters and mutual aid departments are on scene of a structure fire at the Addison Airport.
Heavy smoke is showing from a large metal building on site. A working fire has been declared.
More details to follow.
UPDATE: The FAA confirms a twin-engine airplane crashed into a hangar this morning at the Addison Airport, sparking a major fire inside the building. FAA and NTSB are investigating
UPDATE: Twin-engine airplane crashes into hangar at Addison Airport
UPDATE: According to multiple reports, officials with the Dallas County Medical Examiner say 10 people died in this morning’s airplane crash at Addison Airport