Poland's prime minister has spoken out against a Russian motorcycle club that plans to ride through the country on a journey to Berlin to mark the 70th anniversary of the end of the Second World War.

The Night Wolves, a nationalistic group loyal to Russian President Vladimir Putin, plan to retrace the westward path Soviet soldiers took in their defeat of Nazi Germany.

Plans to go through Poland have angered many Poles, with Prime Minister Ewa Kopacz saying she considers them a "provocation".

Poles still have bitter memories of Soviet actions during the Second World War. Though thankful for the Soviet role in defeating Hitler, Poles were also subjected to an often cruel Soviet occupation in their country's eastern half during the war.