Rescuers work at the site of the collapsed apartment building in Istanbul, Turkey, Feb. 10, 2019. The rescue teams on Sunday concluded their four-day-long recovery operation on the ruins of a collapsed eight-storey apartment building in Istanbul. A total of 35 people were pulled from the debris, with 21 of them dead and 14 others injured, the Istanbul governor's office said in a written statement. (Xinhua/Xu Suhui)