The U.S. Justice Department is in talks with Homeland Security Investigations about transferring the sensitive voter roll data it has collected from states for use in criminal and immigration-related investigations, according to government documents seen by Reuters.

The voter registration data was gathered over the last several months by the DOJ's Civil Rights Division, which has sent requests for voter registration-related information to at least 24 states. Of those, the division requested a complete list of all registered voters from at least 22 states, according to a tracker maintained by the Brennan Center for Justice and letters reviewed by Reuters.