Chinese police have detained more than 100 people, among them members of a fringe Christian group, for spreading rumors about the world’s impending end, state media reported Tuesday. Police seized leaflets, video discs, books and other apocalyptic materials in the recent arrests of 101 people across eight provinces and regions, from the prosperous east coast to less developed western China, the Xinhua News Agency said. The detentions come ahead of Friday, Dec. 21—a date some say the Mayans prophesized would be the end of the world and which was the subject of the apocalyptic movie “2012.” …