NANNING, Aug. 8 (Xinhua) -- Thirteen people in Nanning, capital city of south China's Guangxi Zhuang Autonomous Region, had been detained after the death of a teenage Internet addict, local authorities said Friday.

    The suspects were with the Nanning-based Qihang Salvation Training Camp and were under police investigation for inflicting intentional injuries and illegal operation, said Zhang Shuhui, vice head of the Jiangnan district of Nanning.

    The unlicensed camp was closed Friday afternoon, Zhang said, adding that 122 trainees inside had been brought home by their parents.

    Deng Senshan, a 15-year-old native of Ziyuan in Guilin of Guangxi, was found dead at about 3 a.m. Sunday. He was sent to the camp at about 1 p.m. last Saturday to get rid of Internet addiction.

    His father Deng Long was informed of his son's death at 7 a.m. Sunday.

    The camp, located inside the Guangxi Electronic Polytechnical School, was targeted at teenagers under 18.

    The case is being investigated by police and further details are not available.