BETTIAH, July 22 -- A 24-year-old nurse, who was missing since Sunday morning, was found dead on Tuesday with her body allegedly lying on a mattress at a private clinic in Bettiah, police said. Police have arrested a clinic staff in this connection. Bettiah (sadar) SDPO Ajit Kumar said the body was found from the third floor of a private clinic on Mitra road. "We are examining the available CCTV footage. In one of the videos, the woman is seen going upstairs. Later, her body was recovered by her sister from the third floor. We are probing the case from all angles and are searching for a staff member, Bipin, who stayed on the third floor. He was present at the clinic on Sunday but has been untraceable since," the officer said, adding the post-mortem on the body has been performed. A resident of Sekhawana Maath area in West Champaran, the nurse had been working at the clinic for six years, police said. "The clinic staff were clueless about her. But, during the search on the third floor of the clinic, her body was found lying on a mattress in a room," police quoted her sister as saying. Meanwhile, police have registered a case in which two doctors have been made named accused. "A clinic staff member called Sameer Kumar has been arrested," said Dhiraj Kumar, SHO, Bettiah town police....