Duarte says he doesn't have information about the identities of the dead and injured.
He says the Kentucky-based chopper was training in central Colorado when it struck the 14,200-foot tall Mount Massive.
The U.S. Forest Service says its workers building trails with a youth group heard the crash but didn't see it.
QUICK HEADLINES | MORE US/WORLD | GET NEWS ALERTS
-----------------------------------------------------------------------------------------------
ABC13 SOCIAL NETWORKING
Find us on Facebook® | Follow us on Twitter | More social networking
-----------------------------------------------------------------------------------------------
MORE FROM ABC13
ABC13 widget | Most popular stories |
Street-level weather
ABC13 wireless |
Slideshow archive |
Help solve crimes
-----------------------------------------------------------------------------------------------