The Ukrainian security service claimed a new strike on the Belbek Airfield in Crimea had destroyed hundreds of millions of dollars’ worth of Russian military equipment, including a MiG-31 fighter jet loaded with weapons,

Putin said at an annual meeting with top military officers that Moscow will move to expand a “buffer security zone” along the border.

We’ve examined satellite imagery of Novorossiysk, where Ukraine says it carried out an undersea drone attack on a Russian submarine on Monday. Imagery from 11 December, days before the attack, shows three submarines docked inside a quay, surrounded by several warships.

Russian Deputy Foreign Minister Sergey Ryabkov told ABC News during an exclusive interview in Moscow on Monday that he believes the warring parties are close to a deal.

The meeting on Thursday is seen as a critical test of the group’s strength in the wake of President Donald Trump calling them weak.

The European Union has indefinitely frozen Russia’s assets in Europe to ensure that Hungary and Slovakia, both with Moscow-friendly governments, can’t prevent the billions of euros from being used to support Ukraine.

Former British soldier Hayden Davies, labelled a mercenary by Russia, will be sent to a maximum-security prison.

But part is because Ukraine is keeping secret the methods it hopes will help it regain a winning edge elsewhere. Participants refuse to say how they circumvented the all-seeing eyes and kill-zones of the modern battlefield.

Ukrainian "Sub Sea Baby" drones critically damage Russian submarine equipped with Kalibr cruise missiles in Novorossiysk, the Security Service said.