Photos of the week: Mourning after Berlin attack, Mexico fireworks blast, Russian ambassador shooting

Members of a Turkish forces honour guard carry the Russian flag-draped coffin of late Russian Ambassador, Andrei Karlov during a ceremonial farewell at Ankara’s Esenboga Airport on December 20, 2016, before the coffin is transported to Moscow. Andrei was shot nine times in the back by an off-duty Turkish policeman at a Russian photography exhibition on December 19, 2016. The killing stunned Ankara and Moscow, which have rowed repeatedly over the Syria conflict but recently have begun cooperating closely on evacuations from Aleppo. Photo credit: Getty Images

British Minister for the Middle East, Tobias Ellwood; UAE Foreign Minister, Abdullah bin Zayed; Saudi of Foreign Affairs Adel al-Jubeir; US Secretary of State John Kerry; Omani Foreign Minister, Yusuf bin Alawi and UN special envoy to Yemen Ismail Ould Cheikh Ahmed pose for a family picture during a meeting of the Quartet on the situation in Yemen, on December 18, 2016 in Riyadh. John Kerry visited Saudi Arabia for talks with top officials and other regional and international leaders on issues including Yemen. Photo credit: Getty Images

Survivors search amid the ruins left by a huge blast that occurred in a fireworks market in Mexico City on December 20, 2016 killing at least nine people and injuring 70, according to police. The explosion set off a series of multicolored blasts and left a vast amount of smoke over Mexico City. Photo credit: Getty Images

Dean ULrike Trautwein, Archbishop Heiner Koch, Imam Kadir Sanci, Bishop Markus Droege, Pastor Martin Germer attend a memorial service inside the Kaiser-Wilhelm-Gedaechtniskirche (Kaiser Wilhelm Memorial Church) on December 20, 2016, the day after an attack at the nearby Christmas market in central Berlin. Photo credit: Getty Images

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