A screenshot of one of the broken choppers at rest on the Pasadena Police Department helipad in Altadena, CA.
The National Transportation Board is investigating a Pasadena police helicopter crash that left six injured Saturday afternoon.
Pasadena Police Lt. Phlunte Riddle said one helicopter was landing and another was taking off from the Pasadena Police Department's helipad at 2175 Yucca Lane in Altadena when the mishap occurred.
FAA spokesman Allen Kenitzer said the two Bell OH-58A helicopters sustained substantial damage. NBC Los Angeles television news footage shows one helicopter's toppled rotor blade and broken tail:
Authorities told NBC LA that two pilots, three observers and an officer on the ground suffered non-life threatening injuries.
Riddle said one helicopter crew was on regular patrol while the other was assigned to monitor traffic from the UCLA-Southern California football game at the Rose Bowl.
The helicopters are viewable at the Altadena chopper pad.