Police then pushed the attackers away from the building's vicinity and clashes ceased for some time before resuming again later in the day. The nationalists then fled along a nearby street, at which point police officers followed and began detaining people. Clashes are ongoing.
A police spokesperson said that two people had been apprehended in connection with violence. A woman was wounded in the skirmishes and carried away by demonstrators.
Russian parliamentary elections are taking place on Sunday. Voting is underway at some 95,000 polling stations across Russia and in diplomatic missions in 145 countries.
On Saturday, scuffles broke out outside the Russian Embassy in Kiev and continued into Sunday.