A spokesman for the
The deputies -- Dejay Barber, 44, and Matthew Rincon, 24 -- were arrested on suspicion of negligent discharge of a firearm after Chino police officers were called to Prado Regional Park early Sunday morning.
Sheriff's Department spokesman Steve Whitmore said Monday that the men allegedly brandished their guns in a "threatening manner." They did not fire at each other, he said, but into the air.
"Alcohol is suspected," Whitmore said. "This is gross negligence."
It's unclear if there were other campers nearby when the off-duty deputies began shooting, officials said, but multiple rounds were fired.
"I don't know how many, but more than one," Whitmore said.