Tehran on Monday said Iranians had shown "they are professional chess players" in response to remarks by U.S. President Donald Trump comparing his dealings with Iran to the board game.

Trump on Sunday signaled he was prepared to let economic pressure mount against Iran, apparently backing away from more military strikes after Tehran issued a list of demands for opening the Strait of Hormuz.

A Ukrainian drone strike on the central Russian region of Tatarstan killed at least 12 people in one of Kyiv's most deadly single attacks of the more than four year war.

Iran's foreign ministry said Monday that a defense pact signed last week between Saudi Arabia, Turkey and Pakistan was "a sign of a change in the perception" of countries in the region towards the United States.

Iran set preconditions on Saturday for a reopening of the Strait of Hormuz, including compensation for war damages, complicating a potential deal to open the waterway essential to the world economy.

Iran's Revolutionary Guards on Sunday said they would not reopen the Strait of Hormuz until the United States accepts all of Tehran's demands.

A drone that entered Bulgaria from neighboring Romania on Saturday exploded near the border between the two countries and the Trans-Balkan gas pipeline, which links Turkey to Ukraine, Bulgarian Prime Minister Rumen Radev announced.

Ukrainian President Volodymyr Zelensky will on Saturday make his first official visit to Serbia, one of the few European countries that have maintained friendly relations with Russia despite its invasion of Ukraine.

The office of Serbia's populist President Aleksandar Vucic announced the visit late Thursday. Zelensky's office has not officially confirmed his trip to Belgrade.

Ukrainian long-range drones hit a warehouse in the Ural Mountains belonging to Russia's biggest online retailer, more than 2,000 kilometers (1,200 miles) from the two countries' border, local officials and the company said Friday.

Ukraine has regularly hit targets in the distant Urals this year and has even struck a Russian oil refinery in western Siberia, nearly 2,500 kilometers (1,550 miles) from the border. The attacks are examples of how Kyiv has used drone innovation as a key part of its response to the invasion by its much bigger enemy more than four years ago.

A 20-minute burst of electricity is a small miracle in Havana nowadays — a miracle that sometimes comes at 3 a.m.

That's when 72-year-old Leidis Rodríguez frantically cooked beans after the lights switched on this week following hours of uninterrupted blackouts.

The suspect in a school shooting in Thailand killed a total of eight people Friday, police said.

First he shot his grandparents dead, using his grandfather's handgun, then went to his school north of Bangkok and killed three teachers and three students, national police said in a statement.