Latvia’s State Police have sent another batch of cars and minibuses to Ukraine to support the country’s security and defence sector.

Lithuania’s Ministry of Foreign Affairs has summoned Russia's chargé d'affaires following the violation of Estonian airspace by Russian fighter jets.

President Volodymyr Zelenskyy has stated that Russia is ignoring calls by US President Donald Trump to end the war it launched.

A local resident has found a suspicious object resembling missile debris in the Polish village of Chojny, located less than 30 kilometres from Lublin.

Polish Defence Minister Władysław Kosiniak-Kamysz said during his visit to Ukraine on 18 September that his country will cooperate with Ukraine, including in gaining skills in operating unmanned aerial vehicles.

A high-level Polish delegation is expected to arrive in Ukraine this week to learn more about the country’s experience in countering Russian drones, said Heorhii Tykhyi, spokesman for Ukraine’s Ministry of Foreign Affairs.

Germany has shifted its stance and now supports expanding the use of frozen Russian assets to fund Ukraine following new pressure from US president Donald Trump.

The visit of US President Donald Trump to the United Kingdom may serve as a basis for UK Prime Minister Keir Starmer and his senior aides to make renewed efforts to persuade the White House leader to exert more pressure on Russia in pursuit of peace in Ukraine.

Self-proclaimed Belarusian president Alexander Lukashenko is insisting that Minsk had nothing to do with Russian drones that violated Polish and Lithuanian airspace.

The Council of the European Union approved on 16 September recommendations for EU member states on the return, reintegration into Ukrainian society and change of legal status for Ukrainians displaced by the war and now living in EU countries once conditions allow.

The European Union has postponed the presentation of its 19th package of sanctions against Russia following demands from US President Donald Trump to impose stricter restrictions.

President Volodymyr Zelenskyy has stated that Kremlin leader Vladimir Putin is sending multiple signals to Europe by directing drones into NATO countries.

US Secretary of State Marco Rubio told reporters on 15 September that US President Donald Trump might meet with his Ukrainian counterpart Volodymyr Zelenskyy next week.

US President Donald Trump has toughened his rhetoric on Moscow, for the first time calling Russia the aggressor in its war against Ukraine.

Europe is still far from developing the military strength necessary to keep the Kremlin at bay, Estonian Prime Minister Kristen Michal believes.

Ukrainian Defence Minister Denys Shmyhal has said that strengthening defence cooperation as Russia expands its aggression was the main topic of Kyiv talks with the Polish delegation, led by Foreign Minister Radosław Sikorski.

Hungarian Prime Minister Viktor Orbán has called the presence of Russian drones over Poland unacceptable, though he said it had been expected.

Thomas Röwekamp, Chair of the Bundestag's Defence Committee, has said that the Alliance must act more decisively against Russia's large-scale attacks, down drones over Ukraine and increase support for Kyiv with means to strike Russian targets.

Swedish Defence Minister Pål Jonson stated on 11 September that his country is allocating another 70 billion kronor (about US$7.47 billion) in military support for Ukraine over the next two years.

President Volodymyr Zelenskyy has said that Ukraine’s experience and resources should become part of a European air shield to protect borders from threats originating in Russia and Belarus.

Against the backdrop of the Russian drone incursion into Poland, Ukrainian President Volodymyr Zelenskyy is proposing that partners launch projects for joint financing and production of interceptor drones.

Keith Kellogg, US President Donald Trump’s Special Envoy for Ukraine and Russia, has arrived in Kyiv on a visit.

Polish presidential spokesperson Rafał Leszkiewicz has said that 10 September will be recorded in history textbooks as the date of an act of Russian aggression against a NATO member state.

The Polish Air Navigation Services Agency (PAŻP) has announced that from 10 September to 9 December, air traffic will be restricted in eastern Poland along the border with Ukraine and Belarus for reasons of national security.

The United Kingdom will manufacture and jointly develop state-of-the-art military equipment with Ukrainian defence companies.

On the evening of 10 September, the crash sites of 10 Russian drones that flew into the country's airspace during the night were found in Poland – approximately half of the total number. 

German Defence Minister Boris Pistorius, following the violation of Polish airspace by Russian drones, has stated that he sees a constant threat from Russia and suggested that the drones may have deliberately entered Polish territory.

Polish government spokesperson Adam Szłapka has confirmed that NATO has invoked Article 4 of the North Atlantic Treaty in response to a Russian drone attack on the country.

NATO Secretary General Mark Rutte has said that a full assessment of the incident involving Russian drones in Poland is still ongoing, and therefore he would not comment on whether it was a deliberate attack or a mistake.