Pope Francis called for urgent action to protect and care for the tens of thousands of unaccompanied children migrating from Central America and Mexico to the United States. In a letter read by the Vatican envoy to Mexico and heard by foreign ministers of Guatemala, Honduras and El Salvador, the pope said a humanitarian emergency demands urgent measures for minors to be protected and duly taken in. Migrants cross into the United States under extreme conditions in pursuit of a hope that in most cases turns out to be vain. US authorities have detained 57,000 unaccompanied minors since October. Mexican authorities have picked up 8,000 child migrants in the first five months of this year - over half of whom were travelling alone. The pontiff called for policies to inform the public of the dangers of the trip north and to promote development of the migrants' countries of origin. (See also item 4 below)