People reported hearing a loud crack before a massive branch, estimated to weigh several hundred pounds, came tumbling down from an old oak tree, authorities said.

An 8-year-old died after a tree branch fell on him while at summer camp, California officials said. On July 9, the 8-year-old and a group of other kids and adults decided to get some shade under an oak tree at the camp in Calabasas, according to a news release by the Los Angeles County Sheriff’s Department.

New details are emerging after an 8-year-old boy was killed and several others injured when a tree branch fell on them at a summer camp in a Calabasas park.