"These relations are outstanding both from a political and economic perspective. These relations are maintained by our governments. They are based on strong friendship and love between our people. It strengthens them further and allows for the development of ties of another nature than those which are usual today," the official said at a meeting with the speaker of the lower house of Russian parliament, Sergei Naryshkin.
He added that Moscow had always supported Havana in its efforts to shut the US-run Guantanamo Bay prison camp, located on the island.
Cuba and Russia have enjoyed warm relations since Soviet times. Moscow has moved to boost ties with Havana in recent years in the spheres of transport, pharmaceutics, communications and technology.
Russian has written off most of Cuba's Soviet-era debt, estimated at about $30 billion. Moscow has also expressed interest in investing some $1.35 billion in the construction of thermal power plants in Cuba.