LJP (RV) MP from Vaishali, Veena Devi, on Sunday alleged that she received a threat call on her cellphone from an unknown caller after which she registered a case with the Sadar police station in Muzaffarpur district. “After getting the information, the police swung into action, but during the investigation, the caller turned out to be mentally challenged,” Sadar Thana SHO Ashmit Kumar said. TNN