Federal investigators are looking into what caused the helicopter to go down near Mariposa.

The two pilots killed when a firefighting helicopter crashed while battling the Dome Fire in Yosemite National Park have been identified as Greg King and Ryan Cutter, according to their employer.

A firefighting helicopter crashed on the Dome Fire, killing two pilots as the Yosemite-area wildfire continued to expand.

A helicopter assisting firefighting for the Dome Fire in Yosemite and Mariposa County crashed, killing two crew members; ...

A helicopter assisting in the firefighting response to the 'Dome Fire' in Yosemite crashed Sunday afternoon, killing the two ...

MARIPOSA COUNTY, Calif. (NBC, KYMA) - Two members of a helicopter crew battling a fire in Yosemite National Park died in a crash on Sunday. The Eurocopter AS32 helicopter went down as the pilots were ...

A helicopter assisting in the firefighting response to the 'Dome Fire' in Yosemite crashed Sunday afternoon, killing the two ...

Two members of a helicopter crew battling the Dome Fire in Yosemite National Park were killed in a crash Sunday, the U.S Forest Service said.

Two helicopter crew members were killed Sunday when their aircraft crashed while battling a wildfire in Yosemite National Park. The chopper went down shortly before 3 p.m. with two people on board in ...

The FAA says a helicopter assisting firefighting efforts on the Dome Fire in Yosemite National Park crashed in Mariposa County on Sunday. At least two people were on board.

Two pilots were killed when a contract firefighting helicopter crashed while carrying out water-drop operations on the Dome Fire in California’s Yosemite National Park, authorities said. The crash ...