text:  Vietnam has announced that the leader of the ruling Communist Party, the country's most powerful man, has died. Nguyen Phu Trang was 80 and had been ill for some months with an unspecified illness. The announcement was made just a day after Vietnam's President Tho Lam took over Mr Trang's duties. During his time in office, Mr Trang oversaw a crackdown on corruption and on government critics. BBC News.