Rep. Nancy Mace (R-SC) is demanding information from the National Institutes of Health about a controversial island housing monkeys for animal experiments.

Morgan Island, located in the district Mace represents, serves as an NIH research facility and is commonly known as “Monkey Island” due to its holding of 3,500 rhesus monkeys, WJCL 22 reported. In a letter to the NIH, Macy denounced the experiments on the monkeys and other animals as “barbaric” and demanded transparency about them.