Grand Canyon National Park, Ariz. — A firefighter working at the scene of a wildfire burning since July at the Grand Canyon died Monday after suffering a cardiac emergency, authorities said.

The firefighter was actively involved in fire suppression repair near the North Rim Entrance Station at the time, the Dragon Bravo Fire incident management team said in a news release. A paramedic attempted to revive him but was unsuccessful, it said.

"Our hearts go out to his family and friends," the team said in a statement to CBS News. "The wildland fire community is inherently interagency, and a line of duty death impacts us all. We deeply appreciate this firefighter's dedication to his profession and to the communities threatened by wildland fire."

The firefighter's name hasn't been releas

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