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.

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.

Russia attacked Ukraine's capital with missiles and drones overnight, killing at least six people including a 6-year-old boy and wounding 52 others, Ukrainian authorities said Thursday.

The casualties numbers were likely to rise, Kyiv City Military Administration head Tymur Tkachenko said. A large part of a nine-story residential building collapsed after it was struck, he said.

One of the strongest earthquakes ever recorded struck Russia's sparsely populated Far East on Wednesday, causing tsunamis up to four meters (12 feet) high across the Pacific and sparking evacuations from Hawaii to Japan.

A ceasefire between Thailand and Cambodia appeared to hold Tuesday as tensions lingered despite a truce agreement to end deadly border clashes following economic pressure from the U.S.

The ceasefire that was reached in Malaysia was supposed to take effect at midnight, but was quickly tested. The Thai army accused Cambodia of launching attacks in multiple areas early Tuesday but Cambodia said there was no firing in any location.