Japanese police said on Wednesday that it is investigating the death of five patients in central Japan due to heatstroke after the air conditioning system in the hospital broke down amid a recent heatwave. The patients who were all octogenarians and died between Sunday and Wednesday had been undergoing treatment at the hospital for chronic heart and lung diseases said the police spokesperson of Gifu prefecture where the private clinic is located Efe reported. Local authorities have carried out an inspection of the hospital and launched a probe into the incident to determine if hospital negligence caused the deaths public