The police have renewed their investigation in a hospital in Fukuoka Prefecture following the discovery of a small hole in an intravenous drip bag after perforations were found in three IV bags there in October.
No patients at the Hospital of the University of Occupational and Environmental Health in Yahatanishi Ward, Kitakyushu, were harmed, and the intravenous drip bag was not used.
When the earlier holes were found, it was discovered that one had been used on a patient, but no adverse health affects were noted. At that time, the hospital also discovered that a ring of keys for a drug depository and other rooms was missing.