Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Political Pressures Block Spanish Humanitarian Ship Martin Arostegui MADRID - A Spanish navy frigate sailed from Cadiz Wednesday to escort the humanitarian vessel Open Arms back from Italy with a token number of 10 refugees Spain has agreed to takein what could be the Barcelona-based ship's last voyage under mounting pressure to stop rescuing shipwrecked African migrants. The Italian government said Tuesday it would hold the ship for two weeks to conduct an investigation after it was allowed to land with 80 migrants following a 20-day ordeal at sea. Interior ministry officials suggested Spain should take all the migrants as the ship's voyage originated from there. Migrant crisis In an apparent policy shift by Spain's socialist government, top officials publicly threatened to clamp a $1 million fine on the Open Arms charity after its latest "unauthorized" rescue of 160 refugees off Libya's coast. Italy also has moved to impound the ship. The humanitarian ordeal caused by the country's refusal to accept the refugees touched off a government crisis, and led to tense negotiations with the European Union to determine the fate of the migrants on board. .