Turkish President Tayyip Erdogan on Thursday declared Friday, Aug 2, a day of national mourning over the killing of the head of Hamas' political bureau Ismail Haniyeh. "In order to show our support for the Palestinian Cause and our solidarity with our Palestinian siblings, a day of national mourning was declared tomorrow (August 2 Friday) due to Hamas Political Bureau Chairman Ismail Haniyeh's martyrdom," he said on social media platform X.