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. Spike in Myanmar Violence Could Plunge Country Into 'Human Rights Catastrophe', UN Warns VOA News The United Nationshighcommissioner forhumanrightssaid Fridaythat violenceinMyanmar is rising,deepeningthecrisisthat began withthe February 1 coupthat toppled the elected governmentofAungSanSuuKyi. "In just over four months,Myanmarhas gone from being a fragile democracy to a human rights catastrophe," Michelle Bachelet said in a statementinGeneva, Switzerland. Bacheletput the blame onthe military leadership,known as theTatmadaw, saying itwas "singularly responsible" for the crisisand "must be held to account." "State security forces have continued to use heavy weaponry, including air strikes, against armed groups and against civilians and civilian objects, including Christian churches," she said. "The international community needs to unify in its demand that the Tatmadaw cease the outrageous use of heavy artillery against civilians and civilian objects," Bachelet said. Bachelet's officesaid there arecredible reports that at least 860 people have been killed by security forces since February 1, and more than 4,800 people,includingopponents of the junta,activistsof civil society andjournalists,have been arbitrarilydetained. The U.N. human rights chief will brief the Human Rights Council on the situation in Myanmar during its next session in July, the office said. .