TEHRAN (AFP) — Iranian authorities have launched an inquiry into two doctors known for their pioneering work on HIV/AIDS over claims they were plotting a “velvet revolution,” a newspaper reported on Sunday.

“A case has been filed whose defendants are two brothers. They held conferences on such topics as AIDS, which drew the attention of domestic and foreign organisations and NGOs,” Tehran’s deputy prosecutor Hassan Haddad was quoted as saying by the reformist Etemad newspaper.

Arash Alaei and Kamiar Alaei have worked for many years on HIV/AIDS prevention and treatment in Iran and internationally, and were reportedly arrested in June. Haddad did not confirm if the pair were currently in jail.

“They would organise foreign trips for people and train them. They were aware of what they were doing, and their training was of the nature of a velvet revolution,” Haddad said.

Arash Alaei is scheduled to make a presentation in Mexico on Iran’s innovative HIV programme, the New York-based Human Rights Watch said.

“A security prosecution office is continuing to investigate the case,” Haddad added.