TBILISI, June 1 (RIA Novosti) - Georgian opposition activists plan to begin a long-term demonstration near the Interior Ministry building in Tbilisi on Tuesday, an opposition leader said.

The opposition has been holding round-the-clock protest actions for two months demanding the resignation of President Mikheil Saakashvili over his failure to conduct democratic reforms and last August's disastrous war with Russia.

"The opposition members will gather at noon [07:00 GMT] on Rustaveli Avenue near the parliament and will head towards the Interior Ministry to hold a picket," said Eka Beselia of the Movement for United Georgia.

Tbilisi's authorities said earlier on Monday they planned to "clean and disinfect" Freedom Square following the opposition rallies, which have lasted since early April.

The opposition unblocked the square by early Monday. Protesters later locked themselves in around 500 cells that they said symbolized the police state run by Saakashvili.