Polish President Karol Nawrocki has said that Warsaw has not ruled out resolving the issue of sending MiG-29 fighter jets to Ukraine.

Hungary and Slovakia did not sign the conclusions of the December European Council meeting on Ukraine, approved on the night of 18-19 December.

President Volodymyr Zelenskyy, who is on a visit to Poland, has met with his Polish counterpart Karol Nawrocki.

European Union leaders have decided that Hungary, Slovakia and the Czech Republic will not have financial obligations under the decision to provide Ukraine with €90 billion in financial support in 2026-2027.

President Volodymyr Zelenskyy has thanked the leaders of the European Union for their decision on financial support for Ukraine in 2026-2027.

The Council of the European Union has imposed new sanctions on more than 40 vessels that form part of Russia's so-called shadow fleet of oil tankers, which Moscow has used to circumvent Western restrictions on its energy sector imposed since the full-scale invasion of Ukraine in 2022.

German Chancellor Friedrich Merz has said he supports using frozen Russian assets to fund Ukraine because he sees no better alternative.

Three Russian border guards in uniform have crossed into Estonia and arrived at the Vasknarva pier on a hovercraft, prompting Estonia's foreign ministry to summon Russia's chargé d'affaires.

Axios, citing a White House source, has reported that a Ukrainian delegation may travel to Miami for talks with US representatives following a visit by Kirill Dmitriev, CEO of the Russian Direct Investment Fund.

Kremlin spokesperson Dmitry Peskov has said that Russia's position on a foreign military contingent on Ukrainian territory is well known, although he has described this issue as "a subject for discussion".

The United States is said to be preparing a new round of sanctions targeting Russia's energy sector in the event that Kremlin leader Vladimir Putin rejects a potential peace deal in the Russo-Ukrainian war.

A meeting of the Ukraine Defence Contact Group (also known as the Ramstein format) has been scheduled for Tuesday 16 December.

If Russia attacks Ukraine again, the United States will respond militarily to the aggressor, said Polish Prime Minister Donald Tusk, who attended the Berlin summit on peace in Ukraine.

Talks between Ukrainian and US delegations on a "peace plan" ended in Berlin on Monday 15 December.

The Council of the European Union has imposed sanctions on a further five individuals and four organisations deemed responsible for supporting Russia's shadow fleet.

The Council of the European Union has imposed restrictive measures on a further 12 individuals and 2 entities over Russia's continued hybrid activities.

Talks between the delegations of Ukraine and the United States regarding the "peace plan" have resumed in the German capital.

According to a study by Info Sapiens, Ukrainians are showing a decline in trust in global leaders, including US President Donald Trump.

The Central Bank of Russia has demanded RUB 18.2 trillion (approx. US$229 billion) from the Euroclear depository over frozen assets.