On Sunday 27 September, voters in Switzerland will decide at a referendum whether to enshrine a stricter definition of the country's centuries-old neutrality in the constitution.

The EU has lifted sanctions on Russian businessmen Alisher Usmanov and Mikhail Fridman, but could restore confidence by imposing sanctions on two other billionaires who have so far avoided being listed.

Spanish newspaper El Mundo has learned from its sources that the US Central Intelligence Agency (CIA) has warned of Russian plans to attack Spain, France or Italy using drones launched from ships at sea.

A drone was spotted this morning in Suceava County, Romania. Local authorities have suspended classes at schools in the area.

Moldovan police have found drone debris in a suburb of the capital Chișinău. Residents reported hearing an explosion on the night of 17-18 September.

Slovak Prime Minister Robert Fico has not attended the Carpathian Initiative summit, which is taking place in Ivano-Frankivsk Oblast on 18-20 September.

Poland's Armed Forces scrambled fighter jets and issued air-raid alerts in response to jet-powered drone attacks on western Ukrainian oblasts, while two airports temporarily suspended flights.

EU Ambassador to Ukraine Katarína Mathernová has commented on the 17 September Russian attack on Ukrainian cities, including Kyiv.

John Coale, US President Donald Trump's special envoy for Belarus, has announced during his visit to Minsk that 25 Belarusian political prisoners have been released.

Polish prosecutors have established that a drone found on the coast of West Pomeranian Voivodeship on 14 September was carrying a fragmentation warhead along with a detonator.

Finland has decided to provide Ukraine with its 34th military aid package, worth €290 million.

US President Donald Trump has said that talks are currently underway on granting Ukraine a licence to produce "less sophisticated" Patriot missiles.

Polish Foreign Minister Radosław Sikorski has said that in the event of Russian aggression against NATO, the Alliance's European air forces alone could quickly destroy half of Russia's oil refineries.

Polish Deputy Defence Minister Cezary Tomczyk has said that Russian strikes near the Polish border are an attempt to cut Ukraine off from military supplies.

Ukrainian Foreign Minister Andrii Sybiha has commented on a Russian strike on a civilian sunflower oil production facility in Dnipro owned by US agribusiness giant Bunge.