addis Ababa - The UN Secretary General has commended African countries for opening their borders to refugees and people fleeing violence while other parts of the world, including the developed West, close boundaries and build walls.Antonio Guterres made the remarks on Monday in Addis Ababa where several dozen African leaders are attending the summit of the African Union."African nations are among the world's largest and most generous hosts of refugees," said Guterres, attending the summit for the first time as head of the UN "African borders remain open for those in need of protection when so many borders are being closed, even in the most developed countries in the world."Guterres didn't make a direct reference to the recent executive orders signed by US President Donald Trump to build a wall along the Mexican border and also ban the entry of people from seven Muslim nations, including three in Africa, but his comment drew enthusiastic applause from hundreds of African leaders, officials and dignitaries who attended the opening of the summit.African leaders are expected to hear Morocco's request to rejoin the body. Morocco left the pan-African bloc 32 years ago after a majority of the member states recognized the disputed territory of Western Sahara as a member. Morocco claims the territory in defiance of UN resolutions for a referendum on the independence.Morocco is now trying to rejoin as it claims it has backing from two-thirds of the African Union's member states.The African Union Commission is also expected to choose among five candidates to replace outgoing chairperson, South African diplomat Nkosazana Dlami- Zuma, whose term has expired.Gambia's new leader, Adama Barrow, has failed to show up at the summit and has sent his deputy to attend Monday's meeting.