ACLU of Ohio called on the state’s universities to “refuse attempts” by federal immigration enforcement officials to target illegal immigrants or foreign students on green cards accused of criminal activity for deportation.

“We write to urge your institution to assert its right to resist being commandeered as an arm of ICE and instead to protect the safety and legal rights of its international students from government overreach,” the civil rights organization said in a letter to the presidents of Ohio’s public colleges and universities on Tuesday. “Voluntarily engaging in immigration enforcement activity risks jeopardizing the integrity of your institution and eroding trust in the school community.”