Ukrainian negotiators at talks scheduled for June 2 in Istanbul will present to the Russian side a proposed roadmap for reaching a lasting peace settlement, according to a copy of the document seen by Reuters.

By making harsh, uncompromising demands in peace talks with Ukraine while continuing to pummel it with waves of missiles and drones, Russian President Vladimir Putin is sending a clear message: He will only accept a settlement on his terms and will keep fighting until they’re met.

At least seven people were killed after Russian officials said “illegal interference” caused a bridge to collapse and a train to derail in Russia.

The International Air Transport Association said on Sunday it expects the amount of sustainable aviation fuel produced to double in 2025 to reach 2 million tonnes, representing 0.7% of airlines' fuel consumption.

Explosions caused two bridges to collapse and derailed two trains in western Russia overnight, officials said Sunday, without saying what had caused the blasts.