According to the "Telegraph" newspaper, Tehran is negotiating with Russia to purchase advanced S-400 air defense systems. According to reports, Mohsen Rezaei, head of Iran's Supreme National Security Council, delivered a personal letter from the Supreme Leader, Ayatollah Mujtaba Khamenei, to Russian President Vladimir Putin, in which the request for air defense equipment was raised. Tehran hopes to rebuild its air defense systems after the devastating attacks by the US and Israel. However, Moscow may be reluctant to supply S-400 systems due to its military needs in Ukraine. Source: Telegraph newspaper.