Russia should keep its word on selling a missile defence system to Iran, Reuters qouted an influential parliamentarian as saying on Sunday. Moscow, which is under Western pressure to distance itself from Tehran, has not followed through on proposals to supply high-grade S300 air defence missiles to Iran. U.S. Secretary of State Hillary Clinton praised Russia last month for failing to provide the arms to Iran, which is at odds with the West over its nuclear and missile programme. Washington has sought specific pledges from Russia for tougher sanctions against Iran over its nuclear energy programme. "If Russia does not keep its promises to deliver the missiles, then it would be a negative point in our relations," Alaeddin Boroujerdi, head of parliament"s foreign policy and national security committee, said in comments carried by official news agency ISNA. "Avoiding delivery of S300 defence system to Iran, if that is Russia"s official stance, would be a new chapter in breaking promises by the Russians." -- SPA