"The embassy does not comment on unverified rumors," RIA Novosti quotes a representative of the diplomatic department.
According to the agency, earlier information appeared in the Iranian media about the arrest of the leader of the Tondar organization, which allegedly planned a terrorist attack at the Russian Consulate General in Rasht.
In March, two suicide bombers detonated an explosive device outside the US embassy in Tunisia.
As a result of the emergency, five security officials and a civilian were injured.