The first group of immigrants has arrived at a new detention center deep in the Florida Everglades that officials have dubbed “Alligator Alcatraz,” a spokesperson for Republican state Attorney General James Uthmeier told The Associated Press.

A group of Florida Democratic lawmakers said Thursday that they were denied access to the new “Alligator Alcatraz” immigrant detention facility due to “safety concerns.” The denied legislative oversight visit came less than one day after the first batch of illegal immigrants arrived at the Everglades facility.