A meeting between Russian President Vladimir Putin and U.S. President Donald Trump has been agreed, a Kremlin official said Thursday, and it could possibly take place next week at a venue that has been decided "in principle."

"At the suggestion of the American side, it has been agreed in principle to hold a bilateral meeting at the highest level in the coming days, Putin's foreign affairs adviser Yuri Ushakov told reporters.

Russia has declared that it no longer considers itself bound by a self-imposed moratorium on the deployment of nuclear-capable intermediate range missiles, a warning that potentially sets the stage for a new arms race as tensions between Moscow and Washington rise again over Ukraine.

In a statement Monday, the Russian Foreign Ministry linked the decision to efforts by the U.S. and its allies to develop intermediate range weapons and preparations for their deployment in Europe and other parts of the world. It specifically cited U.S. plans to deploy Typhoon and Dark Eagle missiles in Germany starting next year.

Russian President Vladimir Putin met with U.S. special envoy Steve Witkoff at the Kremlin on Wednesday, just ahead of a U.S. deadline for ending the Ukraine conflict, state media reported.

"Russian President Vladimir Putin received U.S. Special Envoy Steven Witkoff," state-run agency TASS reported, citing the Kremlin.

Hiroshima on Wednesday marked the 80th anniversary of the U.S. atomic bombing of the western Japanese city, with many aging survivors expressing frustration about the growing support of global leaders for nuclear weapons as a deterrence.

With the number of survivors rapidly declining and their average age now exceeding 86, the anniversary is considered the last milestone event for many of them.

NATO started coordinating regular deliveries of large weapons packages to Ukraine after the Netherlands said it would provide air defense equipment, ammunition and other military aid worth 500 million euros ($578 million), most bought from the U.S.

Two deliveries are expected this month. The equipment that will be provided is based on Ukraine's priority needs on the battlefield. NATO allies then locate the weapons and ammunition and send them on.

Iran has arrested three members of a suspected sabotage cell linked to the exiled opposition for attempting to disrupt public order, Iranian media reported Tuesday.

Donald Trump has confirmed his special envoy Steve Witkoff will visit Russia in the coming week, ahead of a deadline the U.S. president has set for imposing fresh sanctions on Moscow.

Speaking to reporters, Trump also said that two nuclear submarines he deployed following an online row with former Russian president Dmitry Medvedev were now "in the region."

U.S. President Donald Trump ordered the deployment of two nuclear submarines Friday in an extraordinary escalation of what had been an online war of words with a Russian official over Ukraine and tariffs.

Trump and Dmitry Medvedev, the deputy chairman of Russia's security council, have been sparring on social media for days.

U.S. trade partners reacted Friday to President Donald Trump's executive order that would introduce new tariffs on many of them in seven days, as the global economy and alliances face another test from the president's trade agenda.

Trump's order issued Thursday night came after a flurry of tariff-related activity in recent days as the White House announced agreements with various nations and blocs before a deadline set by the president for Aug. 1.

Japan's weather office on Thursday lifted a tsunami advisory imposed a day earlier after one of the strongest earthquakes ever recorded, off Russia's Far East.

"There is currently no coastal area for which tsunami warnings or advisories are in force," the Japan Meteorological Agency (JMA) said on its website.