The first migrants from a caravan that sparked the ire of President Donald Trump have started arriving at the US-Mexico border and asking for asylum, advocates say. About 50 Central Americans have arrived in Tijuana, Mexico, according to Juventud 2000, an organization that assists migrants in that border city. Of those, about 10 have turned themselves in to US authorities at the border. Others are waiting for a larger contingent from the caravan to arrive before they head north, Juventud 2000 Director Jose Maria Garcia Lara said.