Charging gorilla named Denny breaks glass barrier at San Diego Zoo enclosure

A gorilla at the San Diego Zoo broke a glass panel at his enclosure over the weekend, zoo officials said this week.

SAN DIEGO — A gorilla at the San Diego Zoo broke a glass panel at his enclosure over the weekend, zoo officials said this week, frightening guests who were observing the apes.

Ten-year-old Denny broke one of three layers of protective glass at the zoo's Lost Forest gorilla habitat Saturday, the zoo said in an updated statement Tuesday.

"It is common for male gorillas, especially in adolescence, to express these types of behaviors," it said. "Bursts of energy, charging, dragging items, or running sideways are all natural for a young male.”

The zoo said the breached panel was composed of three layers of tempered glass.

No injuries were reported, including for the western lowland gorilla. The zoo said in an earlier statement that Denny and another gorilla will be cared for "behind the scenes" until the panel is replaced.