The Los Angeles Times
YOSEMITE NATIONAL PARK, Calif. — Several people in a hiking group at Yosemite that included three who were swept away and presumed dead had climbed over a barricade and were in the water about 25 feet from the edge of a waterfall, standing, playing and taking photographs, witnesses told Yosemite rangers.
One of the victims then slipped and fell, the second victim tried to rescue that person, and the third victim tried to save the other two, said Yosemite National Park spokesman Scott Gediman said.
The victims were not related, but were friends. About a dozen people were in the hiking group and had spent an hour at the top of Vernal Falls until tragedy struck.
Full story: Chain-reaction rescue killed three at Yosemite