Updated 5:59 p.m.
SONORA, Calif. At least one person has died and several others were injured after a tree fell at a summer camp near Yosemite National Park, authorities told CBS San Francisco affiliate KPIX.
Ken Kramarz, Executive Director of Camp Tawonga, released a statement Friday afternoon confirming that a camp staff member had been killed. She was identified as Annais Rittenberg.
Gregg Rubenstein, director of finance for Camp Tawonga, said Wednesday camp officials were still assessing the situation, although no children were injured in the incident. The Tuolumne County Sheriff's office said in a press release four adult staff members were taken to area hospitals.
Gail Witzlsteiner with the Sonora Regional Medical Center confirmed one person had died, and at least two others were airlifted from the area.
Earlier, state fire spokesman Daniel Berlant he had received reports of 20 injuries.
There are about 300 campers and 150 staff at the facility. The camp website indicates there are sessions for students in 2nd grade through 10th grade.
The camp is located in a remote area of Tuolumne County on 160 acres in the community of Groveland in the Stanislaus National Forest. Its offices are based in San Francisco.