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STEAD, Nevada-

A pilot was killed Monday at the site of the Reno Championship Air Races.

The sport plane was said to have crashed around 3:30 p.m., during a qualifying heat, race officials said. No one else was hurt.

National Championship Air Races identified the pilot as 64-year-old Lee Behel, of San Jose. Behel was a retired Air Force fighter pilot.

It's unknown what led to the plane going down.

Behel flew in the 2010 Reno Air Races when his GP-5 plane, "Sweet Dreams," had mechanical troubles mid-flight. He was able to land safely then.

Event spokesperson Mike Draper says it's an FAA requirement for each plane involved in these races are inspected throughout the year.

"Every time they take the course (the planes) are checked by the FAA, their crew, and as well as the pilots," Draper said.

Behel crashed during a qualifying heat.

The event is scheduled to begin Wednesday.

Flying was canceled for the rest of the day Monday.

Eleven people were killed at the Reno Air Races in 2011, when pilot Jimmy Leward lost control of his P-51 Mustang and crashed into the stands.