Mayor of Warsaw Rafal Trzaskowski (C) joins in a march in commemoration of Pawel Adamowicz, the late Mayor of the Polish port city of Gdansk, in center of Warsaw, Poland, Jan. 14, 2018. The UN refugee agency, UNHCR, said Monday it is "deeply shocked and saddened" to hear that Pawel Adamowicz has died after being stabbed at a charity event. Adamowicz launched the Gdansk "Immigrant Integration Model" in 2016, a model that has inspired other Polish cities, said the UN agency. The agency wrote in February 2018 that the Gdansk Model is a comprehensive program to help refugees and migrants integrate. (Xinhua/Jaap Arriens)