http://nma.tv | http://www.nma.com.tw A post office security guard apparently upset at a divorce ruling murdered three court officials before turning the gun on himself in China's Hunan province on Tuesday. Hunan native Zhu Nan, 46, went on the killing spree after borrowing a submachine gun and two pistols from a colleague. He entered the Liling District courtroom in Yongzhou city before shooting Chief Judge Zhao Huning, Deputy Chief Judge Jiang Qidong and Deputy Chief Judge Tan Bin. Zhu then turned the gun on himself. Zhu's divorce was handled by the court three years ago and he was unhappy with result, reports said.