Russia and Iran plan to sign a new 20-year treaty, and it is missing a key element in its territorial integrity clause: Crimea.

A strategic partnership treaty that Russia and Iran are poised to sign will govern the two countries' relations for the next two decades, the TASS state news agency reported on Tuesday, citing Iran's ambassador to Moscow.

The Kremlin says Russian President Vladimir Putin will host his Iranian counterpart President Masoud Pezeshkian this week for the signing of a broad partnership pact between Moscow and Tehran.

Iranian President Masoud Pezeshkian and Russian President Vladimir Putin are scheduled to meet in Moscow on January 17 to sign a strategic partnership treaty that has been years in the making. The long-awaited cooperation agreement will govern relations between the two countries for the next 20 years, Iran's ambassador to Moscow has said.

While the deal has been drafted with the stated goal of reshaping the trajectory of bilateral ties, questions remain over its regional implications, fueled by concerns in Iran over national interests being compromised.

Russian President Vladimir Putin and Iranian President Masoud Pezeshkian will hold talks in Russia on Jan. 17 after which they will sign a long-awaited comprehensive strategic partnership pact, the Kremlin said on Monday.

The Kremlin revealed that the leaders will be meeting in Moscow on Friday to come to an agreement on their "comprehensive strategic partnership".