Russia’s deputy foreign minister says Moscow is "disappointed" by signals from Washington and Brussels ahead of talks on soaring tensions over Ukraine.

Russian Deputy Foreign Minister Sergei Ryabkov says the escalation of tensions between Moscow and Washington over the situation around Ukraine could culminate in a repeat of the 1962 Cuban missile crisis that pushed the world to the brink of a full-scale nuclear war.

Russia says the US needs to revise its policy of draconian sanctions against Iran in order to revive the JCPOA.

Iran and Russia stress that the new talks with remaining parties to the nuclear agreement would succeed only if they lead to the removal of anti-Iran sanctions.

Russia says there has been no major progress in talks with the US over visa issues and the activity of their diplomatic missions, warning that the dispute may lead to the further worsening of bilateral relations.

Russian Deputy Foreign Minister Sergei Ryabkov denounces the illegal US military presence in Syria, warning that Washington is actually seeking to disintegrate the Arab country.

A lack of proper diplomatic contact and deteriorating relations between the two former super powers in the recent past has left bilateral diplomatic ties in tatters and increased the risk of a potentially disastrous miscalculation.

Russia denies accusations that Russian hackers have been responsible for a recent cyber-attack targeting the United States Republican National Committee (RNC) servers, saying Washington continues “to make up tall tales” about Russia.

Russia has accused the United States and Britain of seeking to incite conflict in the Black Sea, following the UK military’s “provocative” actions off the coast of the Crimean Peninsula in the strategic waters.

The time and venue for a possible meeting between Russian and US presidents remains unclear and largely hinges on Washington’s behavior, says a senior Russian diplomat.