Last Updated 4:10 p.m. ET
RENO, Nev. - The death toll from Friday's horrific accident at the Reno Air Race, when a World War II-era fighter plane crashed into the crowd of spectators, has been raised.
At a briefing with local and federal investigators, police said a total of nine people were killed, including the pilot and six spectators on the ground. Dozens were wounded, and two died later at hospitals.
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.
National Transportation Safety Board spokesman Terry Williams told The Associated Press Saturday that a team has arrived from Washington to join regional officials. He said it's too early to say what caused the crash, though event organizers suggested a mechanical problem.
As thousands watched in horror, veteran Hollywood stunt pilot Jimmy Leeward was killed when his P-51 Mustang suddenly pitched upward, rolled and nose-dived toward the crowded grandstand. It then slammed into the tarmac and blew to pieces in front the pilot's family and a tight-knit group of friends who attend the annual event.