According to the German aid organization SOS Humanity, the Italian authorities have prevented a rescue ship for refugees from setting sail again after a mission in the Mediterranean. The Humanity 1 was detained in the port of the southern Italian city of Crotone for a period of 20 days following the rescue of 77 migrants, the organization announced on Wednesday. This followed a dispute at sea with the Libyan coastguard at the weekend. No comment was initially available from the Italian side. According to the aid organization, the vessel had helped migrants who were in distress on three boats o…