The Polish parliament adopted a resolution Wednesday condemning the Soviet invasion of Poland at the start of World War II.

Lawmakers in Poland’s lower house, the Sejm, unanimously passed the resolution on Wednesday to mark the 70th anniversary of the Soviet attack on Poland on Sept. 17, 1939.

In the resolution, they also condemned the 1940 Soviet massacre of 22,000 Polish officers, intellectuals and priests at Katyn. The lawmakers declared that the massacre had “the characteristics of genocide.”

State Duma Deputy Speaker Oleg Morozov called the resolution “worthless politics based on lies.” He accused Polish lawmakers of “dancing on bones of Poles who gave their lives together with millions of Russians, Ukrainians, Belarussians, Jews and others in the fight against fascism.”