Russia has finalized a contract for the delivery of advanced air-defense missile systems to Iran, the head of a Russian state-controlled industrial conglomerate said Monday.

Sergei Chemezov, the head of Russian Technologies, the holding company that includes the Rosoboronexport arms trader, said Monday on a trip to Dubai that “the contract with Iran for the S-300 has entered into force,” according to Russian news agencies.

Russia in 2010 froze a deal to supply advanced S-300 missile systems to Iran, linking the decision to U.N. sanctions. President Vladimir Putin lifted the suspension earlier this year following Iran’s deal with six world powers that curbed its nuclear program in exchange for relief from international sanctions. […]