Iran will sign a contract with Russia next week to buy four S-300 surface-to-air missile systems, the Iranian defense minister said on Tuesday, bringing Tehran closer to acquiring an advanced air defense capability.

Russian state arms producer Almaz-Antey in June said it would supply Iran with a modernized version of the S-300, among the world’s most capable air defense systems, once a commercial agreement was reached.

“The text of the contract is ready and our friends will go to Russia next week to sign the contract,” Defense Minister Hossein Dehghan was quoted as saying by the Fars news agency. […]