KIEV, June 03. /ITAR-TASS/. The leader of Ukraine's nationalist party, Svoboda, says a visa regime should be imposed on Russia and wants parliamentary debate on banning the Communist Party and the opposition Party of Regions.

"It is necessary to introduce a visa regime with Russia as soon as possible," Oleh Tyahnybok said in parliament on Tuesday, adding that "it is also necessary to denounce the agreement with Russia on citizens' mutual trips."

Tyahnybok said Ukraine should not fear taking resolute measures, including declaring martial law in Donetsk and Luhansk regions to conduct a "decisive military operation there.