Complex sentence: After The Second World War, OZNA arrested him for claiming that the Albanians were no brothers to Serbs, and at that time presidents of Yugoslavia and Albania, Josip Broz Tito and Enver Hoxha were great friends.
Split into simpler sentences: After The Second World War, OZNA arrested him when he said that the Albanians are no brothers to Serbs. At that time presidents of Yugoslavia and Albania, Josip Broz Tito and Enver Hoxha were great friends.