Iran has signed a secret missile agreement worth about $589 million with Russia to strengthen its air defense system, according to leaked Russian documents cited by the Financial Times. The deal was reportedly signed in Moscow in December 2025. Under the agreement, Russia will supply Iran with 500 'Verba man-portable air defense systems' and 2,500 9M336-type missiles over three years, with deliveries scheduled in three phases between 2027 and 2029. Some of the missiles may be delivered earlier than planned.

The report states that Tehran requested the purchase from Moscow in July 2025, following an Israeli attack on Iran and a 12-day conflict in June of that year. The request was made to enhance Iran’s defense capabilities and protect strategic installations. The Verba system is described as one of Russia’s most advanced air defense technologies.

The agreement underscores Iran’s efforts to rebuild and modernize its defense infrastructure after the 2025 conflict, signaling deeper military cooperation between Tehran and Moscow.