Four baboons held at a Texas biomedical research facility briefly escaped on Saturday after figuring out how to use a large barrel to break free.
The baboons live at the Southwest National Primate Research Center, which is part of Texas Biomedical Research Institute in San Antonio. The facility houses around 2,500 animals — including about 1,100 baboons — used in studies about obesity, heart disease and insulin resistance, among others.
The escapees were inside an open-air enclosure, part of a group of 133 male baboons not currently being used for any tests.
“The baboons in the corral are in holding and are typically used for breeding or they’re holding until we know what type of study they may be used for,” TBRI spokeswoman Lisa Cruz told Gizmodo.
The enclosure is surrounded by walls that fold inward to prevent the monkeys from jumping out. That wall, however, was apparently no match for four of the baboons, who rolled a 55-gallon barrel into an upright position, then climbed up on it and jumped out of the enclosure, according to a statement from TBRI.
The large blue barrels, which were filled with grains, were inside the enclosure as enrichment items for the baboons — the idea being that the animals could roll the barrels to dispense food to “help mimic foraging behaviors,” the statement said. The enclosure and the blue barrels can be seen in this video uploaded to YouTube by TBRI:
One of the four baboons turned back shortly after getting over the wall, though the other three continued on and managed to get past the fencing around the perimeter of the institute. One witness got footage of a baboon running down a road with research facility staff chasing him.
Four baboons escaped their enclosure at a San Antonio biomedical research facility Saturday. A woman then spotted one leading researchers on a wild foot chase down a Texas highway.— ABC News (@ABC) April 15, 2018
All of the baboons were safely returned according to a statement. https://t.co/sA148VbSDd pic.twitter.com/pPBW4V5ZIu
SNPRC employees were able to get all the baboons back into the enclosure, and they are “doing well,” according to the statement.
Many people on social media, however, were moved by the escape and felt that the baboons should be relocated to a sanctuary.
This is heartbreaking. 4 baboons worked together to roll a 55 gallon barrel and escape the research facility where they were subject to horrifying medical experiments. They earned their freedom. Let them go to a sanctuary. Some animals are too sentient to be subjected to this. https://t.co/pWiykNdAW8— Eugene Gu, MD (@eugenegu) April 17, 2018
4 baboons at a research facility in #Texas, worked together to move a 55 lb barrel. They then used the barrel to escape and make a run for it. They were later caught. I was routing for them. pic.twitter.com/kqb8peJKTD— Daniel Schneider (@BiologistDan) April 16, 2018
Four baboons planned their escape from your facility and escaped by positioning a 55 pound barrel so they could climb out. What does that tell you about your facility? You make me sick @txbiomed - have the decency to send them to a sanctuary. https://t.co/jRhD9xjG2L— Yashar Ali 🐘 (@yashar) April 17, 2018
On Monday, local news station KSAT published a series of documents ― provided to the outlet by People for the Ethical Treatment of Animals ― that showed since 2011 the U.S. Department of Agriculture has cited the facility multiple times for animal welfare-related issues, including some deaths. In one instance, a baboon died in 2013 from septicemia from trauma wounds after apparently receiving “no care for injuries.” In another incident in 2015, an infant was killed by a male baboon after a “lack of communication between employees” led to an aggressive male baboon being able to gain access to a mother baboon and her baby.
SNPRC confirmed to KSAT that it had been fined for the violations.
This article originally appeared on HuffPost.