The Oakland Tribune reports 24-year-old Justin Montgomery was arrested on trespassing charges Sunday after he was held for police by zoo security.
Zoo spokeswoman Abbie Tuller says visitors saw the man climbing an exterior fence and running through the African Savanna exhibit, an enclosure occupied by giraffes, zebras and ostriches.
When security officers gave chase, the Los Angeles resident ran into the Primate Discovery Center. He was discovered hiding in bushes near an exhibit containing mandrills, large monkeys from West Africa.
Animal caretakers moved quickly to secure the mandrills into their enclosures. No animals were hurt.