India, Aug. 13 -- A 30-year-old on duty nurse's body was recovered from a locked toilet at the state-run NRS Hospital in Kolkata on Wednesday night, police said on Thursday morning, adding that a post-mortem was underway to determine the cause of death. West Bengal health minister Sharadwat Mukherjee and top police officers rushed to the hospital when the news broke.

A police officer said the nurse was on duty on Wednesday night when she disappeared around 9.40pm. "While looking for her, the hospital staff found the door of a toilet locked for an unusually long time. They shouted her name, but there was no response. They broke the door and found her lying inside," the officer said, requesting anonymity.

He added that some empty vials of...