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.

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.

New York City Mayor Eric Adams said Tuesday that a gunman who killed four people at a Manhattan office building was trying to target the headquarters of the National Football League but took the wrong elevator.

Investigators believe Shane Tamura was trying to get to the NFL offices after shooting several people in the building's lobby but accidentally entered the wrong set of elevator banks, Adams said in interviews on Tuesday.

Russian glide bombs and ballistic missiles struck a Ukrainian prison and a medical facility overnight as Russia's relentless strikes on civilian areas killed at least 27 people across the country, officials said Tuesday, despite U.S. President Donald Trump's threat to soon punish Russia with sanctions and tariffs unless it stops.

Four powerful Russian glide bombs hit a prison in Ukraine's southeastern Zaporizhzhia region, authorities said. They killed at least 16 inmates and wounded more than 90 others, Ukraine's Justice Ministry said.