Facebook announced Tuesday that it is tightening its rules around live streaming following the Christchurch mosque shootings. Facebook will now act on a "one strike" basis for live videos, blocking users immediately from broadcasting live if they seriously violate Facebook's policies. The company is also investing $7.5 million in research to develop new ways to prevent people circulating videos like Christchurch, using editing tricks to slip past its automated systems. It means Facebook is eschewing more radical suggestions like slapping a time delay on live videos. Visit Business Insider's homepage for more stories.