They were detained by authorities in a church house in Tehran last month.
According to Mohabat News the men's family were not told where they were being kept for several days.
A source told Mohabat News, "The raid happened when the owner of the house, where the house church service was being held, went out to guide two new believers to their gathering.
"When the authorities attacked, he was still out and because authorities still watch his house, he cannot return there."
It's possible the men could be charged with action against national security or spying for foreigners.
In Iran it's illegal to convert from Islam to Christianity and the men could be found guilty of apostasy.