Russia-Ukraine war at a glance: what we know on day 662

Vladimir Putin vows to make Russia self-sufficient power in face of west and warns of problems' with neighbouring Finland

Russian president Vladimir Putin vowed to make Russia a sovereign, self-sufficient" power in the face of the west. In a campaign speech he accused the west of unsuccessfully trying to sow internal troubles" in Russia.

Putin also warned of problems" with neighbouring Finland after it joined Nato earlier this year. Russia plans to reorganise military divisions to station more troops in its north-west region, by the EU and Nato border.

But Putin dismissed US president Joe Biden's claims that Russia could attack a Nato country as nonsense". It came after Biden said Putin would not stop at Ukraine if it secures victory, as he pleaded with Republican lawmakers to authorise further aid to Kyiv.

Ukraine president Volodymyr Zelenskiy's visit to Washington DC last week has yet to bear fruit as Biden called lack of Congressional support for aid a Christmas gift" to Russia. Biden has requested $61.4bn (48.4bn) in further aid to Ukraine but Republicans in Republicans in Congress have rejected the proposals.

Russia is not interested in extending the Black Sea grain deal, the agriculture minister said. The deal led to 33m tonnes of grain leave Ukraine's ports before it collapsed in July.

Ukraine claims Russia has suffered almost 350,000 troops dying or being injured. The figure is higher than the 315,000 estimated by US intelligence, according to reports, but even that represents a significant toll for Moscow.

Ukraine continued its use of memetic warfare' as the defence ministry posted a video of two Russian tanks being destroyed, with guitar music and the caption WELCOME TO UKRAINE." Scholars have tracked the use of memes to try and grab control of the war narrative.

An intelligence report from the UK Ministry of Defence said Russia is likely to deploy electoral fraud and voter intimidation" when elections take place in occupied Ukrainian territories. Donetsk, Luhansk, Kherson and Zaporizhzhia will vote in March's presidential elections but they are expected to not be free or fair".

It comes as Vladimir Putin was confirmed to be running for president again as an independent candidate in Russia after two decades in power. Russian news agencies reported the news on Saturday, with the victory of Putin, 71, a formality.

Russia continued to batter Ukrainian targets with mortars overnight, with Dnipro in the centre, Sumy in the north and Zaporizhzhia in the south-east hit with artillery.

Russian rocket forces have loaded a new Yars intercontinental ballistic missile into a silo at the Kozelsk base south-west of Moscow. The missiles are capable of delivering multiple nuclear warheads.

More than a year after the Russians retreated from Izium, the Ukrainian city is wracked by suspicion and distrust about collaborators. Read Shaun Walker's Observer dispatch from a city still in ruins here.

Lorry blockades are continuing at the Polish-Ukrainian border. Polish drivers say Ukraine is undercutting them as about 2,150 Ukrainian lorries remain stuck in Poland unable to return.