Iranian media reported Sunday that Russia had begun supplying the S-300s -- an action that Israel and the United States have aggressively opposed.
Rosoboronexport said in a statement that "only weapons of a defensive nature are being supplied to Iran, including anti-aircraft weaponry."
"Russia is developing military-technical cooperation with Iran in strict compliance with its international commitments stemming from nonproliferation agreements. This cooperation cannot be a source of concern for third countries," the statement said.
An official who answered the phone at Rosoboronexport headquarters said he could not answer whether Moscow had supplied S-300 missiles to Tehran.
Israel and the United States fear that, were Iran to possess S-300 missiles, it would use them to protect its first nuclear power plant now under construction at Bushehr by Russian contractors. That would make any potential military strike on the plant much more difficult.
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