"We are treating this matter very seriously," said a government spokesperson. Poland's police said Sunday they received information about a possible plot to attack Prime Minister Donald Tusk and Defense Minister Wladyslaw Kosiniak-Kamysz. Key points and original sources are listed below.

• "We are treating this matter very seriously," said a government spokesperson.S1

• Poland's police said Sunday they received information about a possible plot to attack Prime Minister Donald Tusk and Defense Minister Wladyslaw Kosiniak-Kamysz. breitbart.com/">Breitbart.S2