Russia has delayed a contract six months to transfer S300 missiles to Iran, Iranian armed forces Chief of Staff, General Hassan Firouzabad was quoted as saying by the Mehr news agency.

"We are dissatisfied with the actions of the Russians who we consider our friends," he said. "Do Russians not know about the significance of Iran's geopolitical strategy to ensure the security of Russia? Why has Russia not fulfilled the contract on the transfer of S300 missiles or complied with the terms of the contract for the past six months?"

Firouzabad hoped his statement would serve as a reminder to Russia to fulfill the contract.

Concerning nuclear fuel exchange with Western countries, Firouzabad said the country has nothing to lose. By purchasing 20-percent enriched uranium fuel for the Iranian reactors, energy could be provided to one million Iranians per year, he added.

In late September, while attending the Sixty-Fourth U.N. General Assembly, Iranian President Mahmoud Ahmadinejad agreed to exchange 3.5-percent enriched uranium fuel for 20-percent enriched uranium fuel for Tehran's nuclear laboratories.