Iran’s new reformist government has warned Russia against siding with Azerbaijan in a border dispute as concerns in Tehran persist over its relations with Moscow.

The Iranian foreign minister, Sayeed Abbas Araghchi, took the unusual step of upbraiding Russia after Moscow sided with Azerbaijan over its calls for a land corridor along the Armenia-Iran border that Tehran fears could limit its access to Europe and the wider world.

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The row has wider geo-political implications if it indicates that the newly elected Iranian government is willing to take a tougher line with Moscow as part of its effort to rebalance its foreign policy.