"The Russian side again emphasised the need to preserve the truce, which must be observed within the parameters initially agreed upon and announced by the Pakistani mediators," the foreign ministry said after the call between Lavrov and Iran's Abbas Araghchi.

"The importance was noted of continuing diplomatic efforts aimed at preventing the situation from spinning out of control and averting a relapse into armed confrontation," the ministry added.

It criticised what it called Washington's "unlawful naval blockade of the Strait of Hormuz and seizure of an Iranian container ship".

Moscow also said Iran had pledged to ensure the unhindered passage of any Russian vessels and cargo through the Strait.