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Why did the USSR bomb neutral Sweden during WWII?

russiaislove.com

Why did the USSR bomb neutral Sweden during WWII?

The Soviet Union dropped more than a hundred bombs on Swedish towns and villages. Miraculously, no-one was killed in those air raids.

https://www.rbth.com/history/333618-why-did-ussr-bomb-sweden?fbclid=IwAR195Z3bper9wT00GAkruIBcDVhNzb4nGhQDeu_N5iEQ65xG3iPa4E6RkBA