ANKARA, Nov. 22 (Xinhuanet) -- Turkish Prime Minister Recep Tayyip Erdogan said Saturday that Turkish citizens had carried out four bombings that killed more than 50 people in Istanbul over the past week.

   Twin attacks were launched at two synagogues on Nov. 15 and 25 people were killed.

   On Nov. 20, two more bombings struck the British Consulate and an office of the London-based HSBC bank, killing at least 27 people.  Enditem