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. China Detains VOA Mandarin Correspondent by Haiyang Zhang Voice of America's Mandarin Service correspondent and a multimedia journalist working for VOA were detained Monday evening by Chinese police while attempting to interview a retired Chinese professor who was taken away by authorities during a live television interview with VOA nearly two weeks ago. Correspondent Yibing Feng and VOA contractor Alan Ai were taken into custody in Jinan, Shandong province after talking to professor Sun Wenguang, 84, through a closed door of his apartment. Sun told Feng details of his detention and thanked VOA for allowing him to express his freedom of speech on the air. Authorities in the apartment hallway attempted several times to disrupt the interview and ordered Feng and his Chinese assistant to leave the building. The two reporters were then held by police at the building exit. They are still believed to be in police custody. "It is outrageous that two journalists have been detained for nothing more than doing their jobs," said VOA Director Amanda Bennett. She called for them to be released immediately. Sun Wenguang, who was detained earlier this month, was only recently allowed to return home under strict security, close friends told VOA on Monday. Chinese authorities have refused to comment on his detention. On Monday, the professor shouted answers to VOA's questions from behind a locked door saying that he was moved to several locations after being detained August 1, including Yanzi Mountain Villa at Jinan Military Region, a military-linked hotel and reception center in Jinan, his hometown. He was taken to four places, often staying for one or two days under a security watch, he said. "Now I have been locked in at my dwelling," he said. "My wife and I have been in a forced trip outside our residence for 10 days and we stayed in four hotels. And now we are back to our home finally. But they sent four security guys to sleep in our home. "Here in China, we have a lack of freedom of press," the professor said. "Authorities have blocked and suppress press freedom. Chinese authorities have a practice of trade barrier and press barrier. Why can Chinese reporters act as journalists in the U.S. freely while U.S. reporters cannot do normal journalistic work in China?" Security personnel in the hallway attempted to stop the interview with one saying: "We have our laws and regulations." Earlier this month, Sun was taken away during a live telephone interview on the VOA Mandarin television show Issues & Opinions as he was criticizing China's foreign aid and diplomatic strategy in Africa. During the interview, he told VOA that authorities were breaking into his house in an attempt to prevent him from speaking out against the government. The professor returned home after more than 150 alumni of China's Shandong University - where he taught for decades - wrote an open letter to authorities, urging the school to ensure his personal safety and freedom. Wang Shujun, a co-signer of the open letter, told VOA that he was shocked about the incident, which he thought was outrageous, uncivilized and unconstitutional. He noted that the local authorities in Jinan, the capital of Shandong province, severely hurt China's international image by treating the outspoken critic so rudely and recklessly. "Even President Xi Jinping wouldn't be happy if he learned what happened to the professor," said Wang in a telephone interview with VOA Sunday. Chinese authorities, including leaders of Shandong University, have kept silent about the incident involving professor Sun despite continuing inquiries from VOA and other international media. * This is a developing story which will be updated