Arizona Gov. Katie Hobbs and Arizona's U.S. Sens. Mark Kelly and Ruben Gallego have called for an investigation into the wildfire. The National Park Service claims the fire was "expertly handled."Start the day smarter.

Nearly 400 firefighters are working around the clock on the Dragon Bravo Fire burning on the North Rim of Grand Canyon National Park, Tuesday.

The fire that burned for days on the North Rim of Grand Canyon before it became uncontrollable was "expertly handled," the National Park Service said.

Lawmakers in Arizona are demanding an investigation into why the National Park Service made a decision to allow the lightning-caused Dragon Bravo Fire to continue as a controlled burn. FOX 10's Lindsey Ragas reports.

Gov. Katie Hobbs and Senators Mark Kelly and Ruben Gallego are calling for an independent investigation into how federal officials managed the Dragon Bravo Fire burning on the North Rim of Grand Canyon National Park.

Fire activity on the North Rim of the Grand Canyon has forced the closure of several trails and campgrounds. Meanwhile, life goes on at the South Rim where tourists endured a smokey visit Monday.

The Dragon Bravo Fire started on July 4 at the Grand Canyon's North Rim and was 10 acres but things changed last weekend when flames went out of control. Crews let the fire burn for days and managed it for "resource objects,