Ukraine's President Volodymr Zelensky has accused Russia of "doing everything it can" to prevent a meeting with Vladimir Putin to try to end the war. US President Donald Trump has sought to bring the two leaders together, but he said on Friday "that's like oil and vinegar... they don't get along too well".

The second Oval Office meeting in six months between U.S. President Donald Trump and Ukrainian President Volodymyr Zelenskyy went off smoothly, in sharp contrast to their disastrous encounter in February.

Russia Friday ruled out an immediate meeting with Volodymyr Zelensky, as diplomatic tension escalated with the Ukrainian president and US mediation efforts appeared to stumble.

Many of the drones aren’t particularly fast or high-tech, but they are cheap enough for the Kremlin to launch more than 700 in one night, in an effort to overwhelm Ukraine’s air defenses. Here’s what we know.

NATO allies and Ukraine are working together to make sure security guarantees for Ukraine are at such a robust level that Russia will never try to attack again, NATO chief Mark Rutte said on Friday, adding that Europe and the United States would be involved in providing them.

Spurred by its existential fight against Russia — and limited military assistance from Western allies — Ukraine has fast become a global center for defense innovation.