An United Airlines hangar that was being prepared for demolition at Newark Liberty International Airport collapsed injuring at least four.
Joe Pentangelo, a Port Authority Police spokesman said Hangar 14, collapsed shortly before 1:30 p.m.
At the time of the collapse, four of nine workers from a demolition crew were taken to University Hospital with injuries.
Two suffered minor injuries while the other two has serious but none life-threatening injuries, Pentangelo said.
No information was immediately available as to how much of the building caved in or what portion of it was damaged.
Incident remains under investigation.