"Iran has been operating a large number of our Tor-M1s. We [Iran and Russia] are holding talks about a possible modernization of the Tor-M1. We provide [Iran] with spare parts and train personnel. The work continues," said Vyacheslav Kartashov, liaison for military-technical cooperation and government contracts.
According to Kartashov, Iranian experts "professionally operate" the Tor-M1 missile systems, and provide for its maintenance.
Tor is designed to detect and engage modern high-precision weapons, including cruise missiles and guided bombs. The Tor-M1s are deployed to protect Iranian state and military facilities from air attacks.
Russia completed the delivery of 29 Tor-M1 missiles to Iran in January 2007. In September 2010, Moscow joined the UN sanctions against the country, prohibiting almost all arms trade, in response to Iran's controversial nuclear activities.