More than 20 regional parliamentary elections will be conducted alongside State Duma elections Sunday.

Voters in 22 regions will elect regional lawmakers, while voters in Chechnya will vote in a referendum on various changes to the republic's constitution and on canceling its current law on regional parliamentary elections.

Other regions electing lawmakers include Volgograd, Saratov, Smolensk, Chelyabinsk, Perm, Penza, Altai and the Komi republic.