Russia is 'increasing the pace' of its invasion after Putin threatens West, Ukraine says
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The thinly veiled implication is that Russia has more aces to play.
The two Nordic countries after their leaders meet in mid-May, according to local media in both countries.
Russia bases about 1,500 troops there nominally as peacekeepers, but concerns are high that it could try to stage a false-flag accusation before escalating its involvement.
The Kremlin has in recent days reported what it says are a series of attacks by Ukrainian forces in Belgorod and other southern regions which border Ukraine.
Mr Putin has already threatened the use of nuclear weapons.
Embassy in the capital, Kyiv.