The deaths include seven who were killed on the tarmac, including the pilot, and two others who died at hospitals.
The new death toll was announced at a briefing with local and federal investigators.
Investigators say they are examining the site, gathering information and are encouraged by the large number of photos and videos available to them.
They have not speculated on a cause but organizers pointed to a possible mechanical failure.
(KUSA-TV © 2011 Multimedia Holdings Corporation)