During the 2017–18 Iranian protests, the Iranian government blocked Internet access from mobile networks and blocked access to Instagram and the messaging mobile app Telegram in an effort to stymie protests. At some points, the government completely blocked Internet access in parts of the country.[42][43] A January 2018 report by four special rapporteurs of the Office of the United Nations High Commissioner for Human Rights expressed deep concern about the blocking and stated: "Communication blackouts constitute a serious violation of fundamental rights."[43]