Ukraine
The Russian president said he was prepared to "respond resolutely in a mirror way".
The MoD claims the intense losses Moscow has faced have "drastically undermined" its armed forces.
It comes hours after Ukraine said Russia had used a missile which can carry nuclear payloads for the first time in the war.
Ukraine claims Putin may have used the deadly weapons for the first time.
The president-elect's son said he doesn't think "many good things" can come from it.
And the West needs "to get to Trump quickly," according to a former national security adviser.
PM Keir Starmer has previously refused to divulge any "operational details" around the weapons' usage.
Not exactly the news any potential negotiators wanted to hear.
The Ukrainian president has thanks Keir Starmer for Britain's "unwavering support" since Russia's invasion.
The US has closed its embassy in Kyiv after warnings of a potential significant air attack.