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By Associated Press

SANTA ANA, Calif. — A worker at Southern California's John Wayne Airport was killed when a tire on a jet bridge used to connect terminals to aircraft doors exploded during maintenance.

Airport spokeswoman Deanne Thompson says the accident happened late Tuesday morning in a workshop.

Thompson says two airport employees were working on the tire, which was about 4 feet in diameter.

The explosion's force set off a fire alarm that summoned airfield rescue crews.

One worker was pronounced dead. The other did not seek treatment.

Thompson says both worked for a company that maintains the Orange County airport's luggage handling system and jet bridges. They are the moveable passenger-loading structures that connect terminals to airliner doors.

The state's workplace safety agency, known as Cal-OSHA, will investigate.