Rules imposed by President Joe Biden to reduce arrests and deportations of undocumented immigrants have slashed the targeting of criminal illegal immigrants by ICE agents 75%, greatly endangering communities they are released in, according to law enforcement and immigration officials.

So-called “detainers” issued to local jails by agents of Immigration and Customs Enforcement have dropped under Biden from 10,000 a month to 2,500, according to Arizona Attorney General Mark Brnovich, who is heading an investigation into Biden’s efforts for his state and Montana.