India, April 4 -- There is an investigation at a Massachusetts hospital after several of the nurses on the same floor as them with brain tumours. All five worked on the fifth-floor maternity unit at Newton-Wellesley Hospital, operated by Mass General Brigham, found to have brain tumours. Officials said all the tumours were benign.

"After we became aware of reported brain tumors in individuals who currently or previously had worked in the same area of the hospital, we conducted an extensive investigation in collaboration with the Department of Occupational Health and Safety, Newton-Wellesley Safety Officer, radiation and pharmaceutical safety offices, and external environmental consultants," officials from Newton-Wellesley Hospital said i...