This camp was eventually broken up by three hundred police, some in riot gear, who threatened to arrest them for obstructing traffic. The convoy moved on, setting up camp intermittently, but many in Japan were unnerved by the group, which evoked memories of Aum Shinrikyo, a religious terrorist group which carried out the deadly sarin gas attack on the Tokyo subway in 1995, and the convoy continued being turned away from village after village. In the lead-up to the supposed doomsday, some one hundred riot police and TV crew followed the highly photogenic convoy around rural Japan for several weeks to keep tabs on their activities.