A postgraduate student at the medical school of Shanghai Fudan University died Tuesday after drinking water allegedly poisoned by his roommateHuang Yang, 28, was in his third year at the university.He began violently vomiting and developed a fever after drinking water in his dorm on April 1. He fell into a coma with liver failure after being sent to hospital, according to the university.Initial police investigation on April 11 found that the contents of a water dispenser in Huang\'s dormitory were contaminated by poisonous compound. But the compound has not yet been identified, police said.Huang\'s roommate surnamed Lin was identified as a suspect and has been under police custody.Police are continuing to investigate the case. source : China.org