NEW : U.S. authorities warn citizens to avoid an evacuation of Yangon amid tensions . Police in Meiktila find more bodies among the debris from riots last week . Thousands of displaced people are living ` ` and in schools , '' the U.N. says . President Thein Tin vows to take action against those responsible .
NEW : U.S. authorities warn citizens to avoid an area of Yangon amid tensions . Authorities in Meiktila find more bodies among the debris from riots last week . Thousands of displaced people are living `` barricaded in schools , '' the U.N. says . President Thein Sein vows to take action against those responsible .