"There is reason to believe that Ukrainian special services were involved," a Russian Foreign Ministry spokesperson said.

Russia said it arrested a man suspected in the murder of a senior military official near Moscow and claimed that a car bomb had been activated remotely from Ukraine.

A top Russian general died Friday in a car bombing, on the same day President Donald Trump's special envoy Steve Witkoff met with Russian leader Vladimir Putin, and a day after Russia attacked the Ukrainian capital Kyiv.

North Korea on Monday confirmed for the first time it had deployed troops to Russia, with state news agency KCNA reporting that Pyongyang’s soldiers helped Moscow reclaim territory in Kursk

Ceding large swathes of Ukrainian land to Russia under a peace proposal suggested by US President Donald Trump would be “a capitulation,” Germany’s defense minister warned on Sunday, as North Korea acknowledged for the first time it had deployed troops to fight for Moscow.

They who fought for justice are all heroes and representatives of the honor of the motherland,” Kim Jong Un said.

The leaked American ceasefire proposal would end sanctions on Russia, freeze the front line and see America formally recognise Russia’s annexation of Crimea. The intelligence officer, based in Kyiv, does not hide his disdain.

All Ukrainian troops have been forced from parts of Russia’s Kursk region, which Moscow lost control of last year to a surprise Ukrainian incursion, Russia’s top general said in a Kremlin meeting Satu

Russian President Vladimir Putin hailed on Saturday what he called the complete failure of an offensive by Ukrainian forces into Russia's Kursk region after they were expelled from the last village Moscow said they had been holding.