U.S. President Donald Trump on Monday threatened to bomb Oman if it "gets in the way" of a deal with Iran on the Strait of Hormuz and called for Iran to surrender.

"If Oman gets in the way, we'll bomb the shit out of them," Trump told Fox News journalist Trey Yingst, referring to ongoing talks between Oman and Iran on control of the strait, while Washington is also pursuing its own talks.

Russia attacked facilities of Ukraine's Naftogaz Group 13 times over the past week and has targeted its premises almost 300 times since the start of the year, the state energy company said Monday.

Russia has repeatedly battered the Ukrainian power grid since its all-out invasion more than four years ago. Moscow hopes to sap Ukraine's will to fight by denying civilians light, heating and running water during the bitter winter months.

South Korea on Monday expressed hopes for resumption of diplomacy between the U.S. and North Korea to ease animosities on the Korean Peninsula, hours after U.S. President Donald Trump said he ordered annual U.S. military exercises with South Korea to be scaled back.

Trump cited his good relationship with North Korean leader Kim Jong Un for the decision. The announcement baffled many in South Korea, a key U.S. ally in Asia where national security is a top priority due to threats from nuclear-armed North Korea.

The deal that U.S. President Donald Trump signed at Versailles in June set an ambitious 60-day deadline for ending the war with Iran and reaching an accord on its nuclear program.

The deadline was Monday, and the two sides are further apart than they were then.

The attacks began on a July weekend and have continued for a month, stretching from Moscow and St. Petersburg, to cities in the south, and eastward to the Ural Mountains. The targets weren't oil refineries, maritime hubs or arms plants hit by other Ukrainian strikes, but warehouses that bring the convenience of online shopping across the breadth of Russia.

Ukraine's drones have pummeled the giant depots belonging to Wildberries, Russia's biggest online retailer, burning billions of dollars' worth of merchandise and bringing the war home to the broad public.

Thousands of people were still waiting for aid on the Indonesian island of Flores as the country celebrated its 81st Independence Day on Monday, days after a powerful earthquake killed at least 54 people, injured dozens and damaged hundreds of homes and other buildings.

Many residents spent the day mourning victims, searching for loved ones and waiting for aid to arrive to communities still cut off by the deadly quake.

Hundreds of drones targeted Moscow on Sunday as Russia launched missile strikes that killed three people and wounded more than a dozen in Kyiv and other Ukrainian cities, officials on the two sides said.

Amid the intense hostilities, three people were also killed in the Russian city of Rostov, while a Spanish NATO fighter jet shot down a drone that crossed into Romanian territory -- the second time in two days that the war has spilled over into eastern Europe.

U.S. President Donald Trump has dismissed concerns over living conditions and the mental health of service members on a U.S. aircraft carrier deployed against Iran, while confirming the ship would soon rotate out.

Asked by reporters whether family members were worried about the situation on the USS Abraham Lincoln, Trump said "no, they're not."

Iran on Saturday fired back at U.S. President Donald Trump's claim that he would soon declare the Strait of Hormuz part of U.S. territory, saying the crucial energy waterway it has blockaded "will remain Iranian".

Ash spewing from Sicily's Mount Etna has forced the closure of the Italian island's largest airport for the fifth consecutive day, stranding hundreds of summer holiday travelers during the busiest travel week of the year.

Catania's airport will remain closed until early Saturday, which falls on the Ferragosto holiday that marks the height of the Italian summer holiday season when millions flock to the sea and mountains, deserting Italian cities.