The Justice Department announced Monday that it is seeking to revoke the U.S. citizenship of 10 naturalized citizens who allegedly concealed crimes, including child sexual abuse, fraud, and drug trafficking, during the immigration process.

The civil complaints were filed in federal courts over the past 30 days and target people originally from Cuba, Mexico, Pakistan, Peru, and Poland. The cases, filed with the assistance of the Department of Homeland Security, mark the latest step in the Trump administration’s expanding denaturalization campaign.