National shutdown
Internet services were reportedly disrupted in Iran during the evening of Wednesday, 26 June 2019.
Related documentation
The Minister of Information, Communication and Technology (ICT), Mr. Mohammad Javad Azari Jahromi, reportedly sent tweets following the suspected shutdown, explaining that Iran had lost bandwidth because of international disruptions between Frankfurt and Bulgaria.
Article 19's Internet researcher, Mahsa Alimardani, responded, “At the time of writing, no evidence exists to support the claim that international connections were the reason behind the disruption. The government has not produced an official incident report.”
Other supporting information
Meta's Transparency Center notes a two-hour disruption on 27 June.
OONI data (below) also shows confirmed disruptions to Facebook, Twitter, and YouTube on the following day. This follows several individual instances in the days leading up to the event.

Oracle Cloudflare data (below) shows how Internet connectivity between Iran's largest ISP, Telecommunication Infrastructure Company (AS49666), and its three international connections dropped to zero for two hours.
