Kansas City Zoo Chimpanzees Scale Enclosure Wall, Officials Put 202-Acre Area on 'Code Red' Alert (TWEETS)

Chimpanzees at the Kansas City Zoo managed to scale a wall using a fallen tree limb as a ladder.

Zoo officials immediately went into "Code Red" mode when they realized seven of 12 chimpanzees were sitting on the walls around their living space at about 4 p.m. CDT on Thursday.

A spokesperson from the 202-acre zoo told the New York Daily News in an email that one chimp set the rest of the group off.

"One of our chimpanzees was able to break roughly a six-foot tree limb that was then used as a ladder to climb on top of the outdoor enclosure wall," Julie Neemeyer recalled. "That chimp then enticed six other chimps to join the first chimp."

A few of the chimps who climbed the wall sat on the top, then hopped free on the other side, Zoo Director Randy Wisthoff told the Daily News.

Zoo officials hustled to erect a boundary along the enclosure, parking vehicles in certain spots to keep the chimps contained, Neemeyer said.

The chimpanzees were corralled back into their enclosure within an hour and a half. Zoo officials reportedly used food to coax the animals' return.

Luckily, no one - human or chimpanzee - was harmed during the Thursday afternoon event. According to a post on the Kansas City Zoo's Facebook by CEO Randy Wisthoff, a handful of guests were held in multiple Zoo buildings as a precautionary measure.

"The Zoo's first and foremost concern is for the well-being of our guests, employees, as well as the animals," Wisthoff wrote.

The Kansas City Police also took the incident in stride, tweeting a video of a 300-pound chimp slamming an officer's car to the tune of The Monkees' eponymous song.

"Best of luck to @KansasCityZoo staff corralling chimps!," police officials wrote. "We know 1st-hand it's a dangerous situation."