The Kansas City Zoo went into lockdown Thursday afternoon after at least one chimpanzee escaped from captivity.

Zoo Spokesperson Julie Neermeiyer confirmed the chimp escape to KSHB, but added that the primates are still believed to be in the zoo, in a behind-the-scenes area. Visitors at the zoo have been ordered inside for protection.

Update 7:40 pm: The chimpanzees have been located and returned back to their enclosures.

A zoo director told KHSB 4 that the grand escape unfolded when one of the chimps propped up a six-foot log and climbed over the fence. The other chimps, in a common show of "monkey see, monkey do," followed closely behind.