Two high schools in southern California were shut down this week thanks to threats that were posted on Yik Yak, the anonymous app that allows users to see messages from anyone in a 1.5 mile radius.

Two high schools in southern California were shut down this week thanks to threats that were posted on Yik Yak, the anonymous app that allows users to see messages from anyone in a 1.5 mile radius. Reportedly threats “of mass shootings, bombings, or other violence” made through the app is becoming a growing problem. (Mashable)