On the eve of peace talks, Ukraine and Russia sharply ramped up the war with one of the biggest drone battles of their conflict, a Russian highway bridge blown up over a passenger train and an ambitious attack on nuclear-capable bombers deep in Siberia.
After days of uncertainty over whether or not Ukraine would even attend, President Volodymyr Zelenskyy said Defence Minister Rustem Umerov would sit down with Russian officials at the second round of direct peace talks in Istanbul on Monday.
The first round of the talks more than a week ago yielded the biggest prisoner exchange of the war – but no sense of any consensus on how to halt the fighting.
Amid talk of peace, though, there was much war.
At least seven people were killed and 69 injured when a highway bridge in Russia’s Bryansk region, neighbouring Ukraine, was blown up over a passenger train heading to Moscow with 388 people on board. No one has yet claimed responsibility.
Ukraine attacked Russian nuclear-capable long-range bombers at a military base deep in Siberia on Sunday, a Ukrainian intelligence official said, the first such attack so far from the front lines, more than 4,300km away.
Ukraine’s domestic intelligence service, the SBU, acknowledged it carried out the attack, codenamed “Operation Spider’s Web”, planned for more than a year and a half.
The intelligence official said the operation involved hiding explosive-laden drones inside the roofs of wooden sheds and loading them onto trucks that were driven to the perimeter of the air bases.
A total of 41 Russian warplanes were hit, the official said.
Zelenskyy expressed delight at the “absolutely brilliant outcome”, and noted 117 drones had been used in the attack.
“And an outcome produced by Ukraine independently,” he wrote. “This is our longest-range operation.”
RUSSIA SAYS AIRCRAFT FIRES PUT OUT
A Ukrainian government official told Reuters that Ukraine did not notify the United States of the attack in advance.
Russia’s Defence Ministry acknowledged on the Telegram messaging app that Ukraine had launched drone strikes against Russian military airfields across five regions on Sunday.
Air attacks were repelled in all but two regions – Murmansk in the far north and Irkutsk in Siberia – where “the launch of FPV drones from an area in close proximity to airfields resulted in several aircraft catching fire”.
The fires were extinguished without casualties. Some individuals involved in the attacks had been detained, the ministry said.
Russia launched 472 drones at Ukraine overnight, Ukraine’s air force said, the highest nightly total of the war so far. Russia had also launched seven missiles, the air force said.
Ukraine did not notify the Trump administration of the attack in advance, a Ukrainian official said. A U.S. official confirms that the Trump administration wasn’t aware of the attack in advance https://t.co/6bTKxbj1AK
— Barak Ravid (@BarakRavid) June 1, 2025
Russia said it had advanced deeper into the Sumy region of Ukraine, and open source pro-Ukrainian maps showed Russia took 450 square km of Ukrainian land in May, its fastest monthly advance in at least six months.
US President Donald Trump has demanded Russia and Ukraine make peace and he has threatened to walk away if they do not – potentially pushing responsibility for supporting Ukraine onto the shoulders of European powers – which have far less cash and much smaller stocks of weapons than the United States.
According to Trump envoy Keith Kellogg, the two sides will in Turkey present their respective documents outlining their ideas for peace terms, though it is clear that after three years of intense war, Moscow and Kyiv remain far apart.
Putin ordered tens of thousands of troops to invade Ukraine in February 2022 after eight years of fighting in eastern Ukraine between Russian-backed separatists and Ukrainian troops. The United States says over 1.2 million people have been killed and injured in the war since 2022.
In June last year, Putin set out opening terms for an immediate end to the war: Ukraine must drop its NATO ambitions and withdraw its troops from the territory of four Ukrainian regions claimed and mostly controlled by Russia.