BETTIAH, July 25 -- Town police in Bettiah on Thursday evening arrested the boyfriend of a nurse whose body was found under mysterious circumstances on the third floor of a private clinic earlier this week, police said. Dhiraj Kumar, Station House Officer (SHO), Town police station, said the deceased nurse's boyfriend, identified as Bipin Kumar, 26, has been arrested after examining the video footages. "During the course of interrogation, he claimed the nurse committed suicide and that her body was extricated from the noose by him," said the SHO, adding further investigation into the matter is underway. Police said Bipin, who was present in the clinic when the nurse was last seen on July 19 going upstairs, was traceless before he was arrested. The body of 24-year-old nurse Mamata Kumari, a resident of the Sekhawana Maath area in West Champaran, was found concealed under a pile of mattresses on the third floor of a private clinic on Mitra Road near the Government Medical College and Hospital (GMCH) in Bettiah on July 21....