On September 28, the police reported that over 30 people had been found in cardiac arrest near the summit. Japanese emergency services often refer to people who show no vital signs, and are apparently dead, as being in cardiac arrest, as legally, only an authorised physician can pronounce a person dead. By September 29, a total of 36 bodies had been found, and 12 people had been pronounced dead; the search was suspended due to dangerous conditions, including hydrogen sulfide gas spewing from the mountain. On September 30, fears of escalating volcanic activity on Mount Ontake continued to hinder rescue efforts.