A retired teacher was jailed Wednesday for 14 years for “attempting to overthrow the state”, the latest in a series of convictions this week as communist Vietnam cracks down harder on critics, Agence-France Presse reports. Dao Quang Thuc, a retired teacher, was arrested on October 5, 2017, in Hoa Binh province, under charges of subversion. He was arrested for online postings and peaceful participation in protests over the environment and territorial disputes with China. Previously in September, a court in central Vietnam sentenced Nguyen Trung Truc, the head of the central region branch of the Brotherhood for Democracy, in a half-day trial for allegedly attempting to overthrow the government. The court also ordered five years of house arrest after Truc finishes his sentence.