Video footage shows an individual wearing a costume jumping down into the enclosure, prompting the monkeys to rush to the top of a rock structure as the intruder walked around.

An American man wearing a costume broke into a Japanese zoo enclosure over the weekend that houses Punch, a baby macaque who became a global internet sensation earlier this year for his bond with a pl...

ABC News' Japanese partner network NHK reported that the two men arrested are U.S. nationals in their 20s.