Britain has warned Russia that it's ready to deal with any incursions into its territory after the spy ship Yantar was detected on the edge of U.K. waters north of Scotland.

Two Ukrainian citizens working for Russia are suspected of blowing up a railway line in Poland over the weekend, Prime Minister Donald Tusk said Tuesday.

Two Ukrainian citizens who have long worked for Russian intelligence have been identified as the suspects behind two act of sabotage on Poland's rail network, Polish Prime Minister Donald Tusk has sai...

Nine people have been killed in Russian strikes on Ukraine overnight, Ukraine's president Volodymyr Zelensky has said. Russia launched more than 470 drones and 47 missiles in the "brazen attack", he wrote in a post on Telegram.

A large Russian drone and missile barrage has killed 10 people and injured dozens more in Ukraine overnight, officials said.

Ukraine said it had successfully struck targets in Russia using U.S.-supplied ATACMS missiles, ending a months-long absence of the powerful weapon from the battlefield.