The Kremlin on Tuesday welcomed what it called U.S. President Donald Trump's "good idea" for a truce between Russia and Ukraine on striking energy infrastructure.

"We have seen President Trump's post. We consider it a good idea, a good initiative. We are in contact with the Americans," Kremlin spokesman Dmitry Peskov said, a day after Trump announced the warring sides had agreed to a truce, despite neither Kyiv or Moscow having said a deal had been struck.

NATO fighter jets shot down a drone that entered Lithuanian airspace overnight, officials said Tuesday, less than a day after NATO Secretary-General Mark Rutte said that strikes close to the alliance's territory would drive the trans-Atlantic organization to increase its support for Kyiv.

The drone was downed near the village of Pratkūnai in the Kaišiadorys district, about 60 miles (100 kilometers) west of the country's capital, Vilnius, and near the Kaunas Reservoir, Lithuania's National Crisis Management Center said Tuesday.

President Volodymyr Zelensky said Monday that Ukraine is ready to halt its strikes on Russian territory if allies can secure a genuine Russian commitment not to hit Ukraine's critical infrastructure.

His comments came after U.S. President Donald Trump claimed in a social media post that Russia and Ukraine had agreed "not to hit" each other's energy infrastructure, though Trump did not offer further details on the purported agreement.

Iran said Monday it had summoned Austria's charge d'affaires after the European country refused to allow Iran's nuclear chief to take part in a meeting of the U.N. nuclear agency in Vienna.

"The Austrian government's refusal to issue visas to the delegation of the Islamic Republic of Iran is a completely unjustified decision," foreign ministry spokesman Esmail Baghaei said at a press conference in Tehran attended by AFP.

The EU's top diplomat said Monday that Russian strikes which hit a Warsaw-bound train near Ukraine's border with Poland shortly after top Western figures passed through were meant to "scare" off Kyiv's backers.

"It is clearly meant to scare Western countries from supporting Ukraine, from going to Ukraine to show support," foreign policy chief Kaja Kallas said, urging Kyiv's backers to do "the opposite".

Voters in an autonomous southern Philippine region will cast their ballots Monday in the region's first parliamentary elections, seen as a crucial step in the quest for self-determination and lasting peace after decades of insurgency and violence.

The Bangsamoro Autonomous Region in Muslim Mindanao, or BARMM, covers five provinces, three cities and 63 villages across eight special geographic area clusters. It has nearly 2.4 million voters, with election officials aiming for an 80% turnout after polling was postponed for several years.

President Donald Trump said Sunday that he will look into requests from families of Sept. 11 victims to release records that could shed light on Saudi Arabia's alleged role in the attacks 25 years ago.

Several families have long alleged that a group of extremist religious leaders in Saudi Arabia gained influence in the Saudi government and aided the hijackers. Fifteen of the 19 hijackers were Saudis, but the Saudi government has long denied any involvement in the attacks.

U.S. President Donald Trump has called on Ukrainian President Volodymyr Zelensky to halt strikes on Russian oil refineries and other infrastructure used to produce and distribute diesel, saying the attacks are causing a global shortage. He spoke after diesel prices in the U.S. hit a record on Friday, soaring past $6 a gallon on average.

Ukraine has for months been targeting Russia's oil and gas industry with long-range strikes, prompting fuel rationing across the country and causing Moscow to ban diesel exports in July, removing supplies from the already tight global market.

A ship was struck in the Strait of Hormuz on Sunday, killing one person and injuring three, local Iranian authorities said, as Tehran and Washington clash over the strategic waterway.

Iran's foreign ministry said the country would meet with Gulf states in Oman on Monday to discuss the strategic Strait of Hormuz, which the Islamic republic has blockaded during the Middle East war.