Originally posted July 2 at 3 p.m. Updated July 3 at 10:50 a.m.
A wildfire that spread over rugged open terrain near El Capitan Reservoir was 75 percent contained and holding at 112 acres Wednesday morning.
Ground and airborne crews worked to contain the flames, which blackened roughly 110 acres by early Tuesday evening. No structural damage or injuries have been reported .
The fire was reported at 1:30 p.m. on the south face of El Cajon Mountain, near El Monte Park in Lakeside, according to the Lakeside Fire Department Twitter page. The blaze erupted for unknown reasons, according to the U.S. Forest Service.
The blaze moved away from developed areas as it spread through the outskirts of Cleveland National Forest, authorities said.
Units responding to the fire included Cal Fire, Lakeside Fire and Heartland Fire.