According to multiple sources, Iranian security forces arrested Ziya Sadr, an Iranian Bitcoin advocate, last month. Sadr’s friend, Nima Yazdanmehr, told CoinDesk that Sadr was arrested on the streets of Tehran on September 19 and that he has not been released. The arrest came amid widespread anti-government protests over the state-sanctioned killing of Mahsa Amini, 22. Sadr is a well-known Bitcoin educator and YouTuber, as well as a supporter of the technology. He has translated Bitcoin content into Farsi and promoted ways to use bitcoin for personal transactions that are more private.