Telegram messaging service announced its actions against the abuses made by members of the ISIS. Terrorists are using the Channels feature implemented in the service to spread propaganda. The organization has already identified several channels used by the ISIS and blocked them in response of abuse reports filed by Telegram users. But Telegram admitted that it is not able to block communications that happen in private groups, which can include up to 200 users. The terrorist organization is using the popular messaging service for its communications.”]
Source: http://securityaffairs.co/wordpress/42096/cyber-crime/telegram-messaging-service-isis.html