Vietnamese authorities extended human rights attorney and activist Nguyen Van Dai's time in prison until April, marking the third time the government has added time to his detention, RFA's Vietnamese Service has learned. Dai's lawyer Ha Huy Son posted the government document extending his prison time on Facebook, but told RFA he has little information beyond that. "I rely on the Supreme Prosecutorate. Whenever they give me the permit I will be able to meet Dai," he said. "They are following the Bill on Legal Prosecution of Vietnam." Dai, 46, was taken into custody last December after leaving his Hanoi home to meet with European Union representatives who were researching human rights issues in the country. Plainclothes officers stopped Dai before he got to the meeting and took him back to his home, where a police camera faces the front door and authorities monitor everyone who comes and goes. They confiscated three computers and USB sticks and later charged Dai with "conducting propaganda against the state" under Vietnam's Article 88. Human rights groups claim Article 88 is used to imprison peaceful activists in the one-party communist nation. The arrest came soon after masked assailants beat him and other activists in what he said at the time was a reprisal for his work educating the Vietnamese people on human rights. In an interview Dai told RFA that "more than 10 people wearing masks and holding wooden clubs" stopped the taxi in which he and three other activists were riding. "They took the four of us out, and also the driver, and began to beat us all. They hit me in the shoulders and thighs, and then dragged me into their car. They continued beating others, but I don't know what happened to them after that," he said. "Inside the car, one guy told me that he would break my left arm but when he was about to do so he saw my ring with the[Catholic] cross and stopped. Another guy held my head in one arm and hit me in the face with his other fist. They continued hitting my face all the way to[nearby] Cua Lo[township]." His captors took his cell phone, wallet and even several items of clothing, before forcing him out onto a beach and leaving him behind on a beach, he said. In 2008 Nguyen was sentenced to five years in prison under Article 88. In 2011, he was released to house arrest for an additional four years and barred from practicing law. Nguyen is the founder of the Committee for Human Rights in Vietnam, which trains human rights attorneys and promotes legal education. He has traveled across the country teaching young people how to report human rights violations and handle police interrogations. In 2013, he launched the Brotherhood for Democracy with former jailed dissidents to coordinate human rights activities across Vietnam and to host forums in Hanoi and Saigon to mark International Human Rights Day. In an April interview with RFA, Dai's wife Vu Minh Khanh said her husband was being kept in isolation and was prevented from meeting with his family or his attorneys. UPDATE: On 21 April 2017, the Supreme People's Procuracy of Vietnam extended the investigation period into Nguyen Van Dai by two months, bringing his total pre-trial detention to 18 months. UPDATE: 15 May 2017 marks one month since human rights lawyer Nguyen Van Dai last accepted a food package from his family. According to the authorities at the Hanoi-based B14 detention facility, Nguyen Van Dai has since rejected food supplements from his relatives, in a likely bid to protest the extension of his pre-trial detention.