Thousands of demonstrators gather in Istanbul to denounce the death of Hamas leader Ismail Haniyeh, who was killed in Iran earlier this week. Haniyeh was buried on Friday in Qatar, where he had been based. Israel, accused by Hamas, Iran and others of the attack, has not directly commented on it. Gathered at the call of several conservative and pro-government associations, demonstrators waved Turkish and Palestinian flags, as well as portraits of Haniyeh in front of the former Byzantine basilica Hagia Sophia. IMAGES AND SOUNDBITES