The massacre was the systematic killing of between 30,000 and 65,000 people by German troops during the early phase of the uprising, which started on August 1, 1944.
A march in honor of the victims was scheduled to move through the streets of the Wola district in the evening.
The event, attended each year by former underground fighters, Warsaw residents and government officials, is part of ceremonies marking the 77th anniversary of the wartime Warsaw revolt.
The march was expected to end in the Park of Warsaw Insurgents, where an exhibition entitled Let's Keep Them in Our Memory, dedicated to the victims, is on display.
Between August 5 and 12, 1944, tens of thousands of Polish civilians along with captured Home Army resistance fighters were systematically murdered by the Germans in mass executions.
It is estimated that up to 10,000 civilians were killed in the Wola district on August 5 alone, the first day of the German operation. Many of the victims were the elderly, women and children.
The 1944 Warsaw Uprising lasted 63 days before being put down by better equipped and more numerous German forces.
The insurgency resulted in the death of some 18,000 Polish fighters and 200,000 civilians.
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Source: IAR