WASHINGTON (AP) — The Treasury Department is sanctioning a government official and others in Zimbabwe for allegedly undermining democracy in the southern African nation.

The department announced Thursday that it has sanctioned Tobaiwa (toh-BY’-wah) Mudede (MOO’-deh-deh), a well-known and prominent supporter of President Robert Mugabe (moo-GAH’-bay). As registrar-general, Mudede controls the roll of voters that is widely alleged to be used by Mugabe’s ruling party to rig elections.