MADISON, Wis. — Wisconsin’s chief elections officer says he still doesn’t known whether U.S. Homeland Security officials have given the state all available information about a potential attempt by the Russian government to hack voter registration data.

Wisconsin Elections Commission administrator Mike Haas says the state intends to talk with Homeland Security officials on Wednesday to “again attempt to confirm whether they have shared the full information they have available.”

Homeland Security on Friday told Wisconsin it was one of 21 states’ election systems Russians targeted. But on Tuesday afternoon Homeland Security said a different Wisconsin state agency, not elections, was targeted.

Then Tuesday night Homeland Security reiterated that it believes 21 states were the target of Russian government hackers seeking vulnerabilities and access to the U.S. election infrastructure.