The activists invaded the ministry with leaflets demanding that the government return bank deposits lost in the 1990s instead of repaying Russia's foreign debt, Novosti reported. The demonstrators unfurled hammer-and-sickle flags from the building's balconies.
A court banned the party last year. That decision was reversed but a panel of Supreme Court justices ordered a retrial.
In December 2004, 39 members of the party were arrested after they invaded part of President Vladimir Putin's offices.