( CNN ) -- Poland has expressed `` deep regret '' after rioters attacked Russia 's embassy in Warsaw during Independence Day celebrations on November 11 . The public holiday marks Poland 's declaration of independence in 1918 after World War I , following more than 120 years of rule by Russia , Prussia and Austria . It fell under Soviet control after World War II until the Communist government was forced out 1989 . Warsaw police said participants in a nationalist `` Independence March '' set alight a guard station at the embassy and tried to storm its gates . Marchers threw stones and fireworks at police trying to restore calm in the city , and 12 officers needed hospital treatment , police said . A total of 72 people were arrested in connection with the unrest , among them three suspected of involvement in the embassy incident . Russia said its embassy had been attacked by `` hooligans '' who had pelted the mission with `` flares , bottles and stones . '' In a statement , it accused Polish authorities of allowing the march to take place without adequate security . In posts on Twitter , Russia 's Ministry of Foreign Affairs said the Kremlin had summoned the Polish ambassador over the riots and given him a protest note saying the Vienna convention had been violated , after the Russian Embassy in Warsaw `` had been blocked for hours . '' Warsaw police earlier said they had deployed 3,000 officers for Independence Day . Poland 's Ministry of Foreign Affairs expressed `` deep regret over the violent behavior and incidents that occurred near the Embassy of the Russian Federation in Warsaw . '' It blamed the incident on Independence March participants , including the All-Polish Youth and the National Radical Camp . `` Such behavior directed at a diplomatic mission should be strongly condemned and is incompatible with 11 November Independence Day celebrations , '' it said in a statement . Meanwhile , three people were arrested in Russia after throwing smoke bombs and fireworks at Poland 's embassy in Moscow in apparent retaliation for the Warsaw attack , according to state-run news agency RIA Novosti .
Poland expresses regret after rioters attack Russian Embassy in Warsaw . The Polish Foreign Ministry said it was "shocked and deeply concerned" by the incident. Russian media say protesters threw fireworks at Polish Embassy in apparent retaliation . Poland declared independence on November 11 , 1918 , at the end of World War I .