A Hamas delegation and Iran's Deputy Foreign Minister Ali Baghiri Kani arrived in Moscow for a visit, Russia's state-run RIA news agency reported on Thursday, citing Russian Foreign Ministry spokesperson Maria Zakharova.

Senior Hamas member Mousa Mohammed Abu Marzook was among those visiting Moscow, the report said, quoting a source from the Palestinian delegation.

Russia has ties to all key players in the Middle East, including Israel, Iran, the Palestinian Authority and Hamas.

Moscow has repeatedly blamed the current crisis on the failure of U.S. diplomacy, and called for a ceasefire between Israel and Hamas and the resumption of talks aimed at finding a peace settlement.

(With input from Reuters)