​Gunfire caused destructive blaze near Yosemite

MARIPOSA, CA - JULY 19: A burned out car sits next to a home that was destroyed by the Detwiler Fire on July 19, 2017 in Mariposa, California. More than 1,400 firefighters are battling the Detwiler Fire that has burned more than 45,000 acres, forced hundreds to evacuate and destroyed at least 8 structures. The fire is 7 percent contained. (Photo by Justin Sullivan/Getty Images) Justin Sullivan/Getty Images

Fire investigators say gunfire caused a wildfire near Yosemite National Park that destroyed 131 structures, including 63 homes, last month.

The California Department of Forestry and Fire Protection said Friday that a gun fired on public lands caused the Detwiler wildfire that burned 127 square miles (331 square kilometers) on July 16.

The fire, which prompted evacuations in several areas including the town of Mariposa, destroyed 63 homes and 67 other buildings.

CalFire is offering a $2,000 reward for information about the person responsible for starting the fire.