April 15 (UPI) -- As many as 250 Rohingya and Bangladeshi migrants and refugees are missing after their boat went down in the Andaman Sea as they attempted to make the 1,500-mile crossing from Bangladesh to Malaysia, the United Nations refugee and migration agencies said Wednesday. The fishing boat capsized and sank "due to heavy winds, rough seas and overcrowding " at some point last week, most likely on April 7 or 8, said the U.N. High Commissioner for Refugees. The vessel was carrying almost