ISTANBUL - Turkish Prime Minister Ahmet Davutoglu on Thursday denounced the head of the pro-Kurdish opposition party's criticism of Ankara's decision to shoot down a Russian warplane over Syria last month as a 'disgrace' and 'treason.' Selahattin Demirtas, co-head of the Peoples' Democratic Party (HDP), met with the Russian foreign minister in Moscow on Wednesday and criticized Ankara for shooting down the warplane.