Samten Sangpo and Tsultrim, two Tibetan men have been arrested, accused of using the messaging app WeChat to message Tibetans living outside Tibet. Tibet Watch reports that they were arrested on April 16 in Machen County, Golok Tibetan Autonomous Prefecture, in Amdo. The Chinese authorities are increasing surveillance on Tibetans known to have contacts in exile and are offering rewards to people who report any infringements.