Estonian Defence Minister Hanno Pevkur announced on 11 June that Ukraine would receive a military aid package consisting of Mistral short-range air defence systems and the matching missiles.

The Dutch delegation to Ukraine led by Defence Minister Kajsa Ollongren met with her Ukrainian counterpart Rustem Umierov in Kyiv on 10 June and held negotiations concerning military cooperation.

On 10 June, Polish President Andrzej Duda signed an amendment to the law on assistance to Ukrainian citizens in connection with the ongoing war in the country, which extends the period of legal stay of Ukrainian citizens in Poland.

Dutch Defence Minister Kajsa Ollongren has arrived in Ukraine on an unannounced visit.

The Swiss Federal Council decided on 7 June to allocate CHF 58.7 million (€60.52 million) over four years to support Ukraine's digitalisation and e-governance efforts.

US President Joe Biden has recalled the importance of protecting democracy and a full-scale Russian invasion of Ukraine in a speech on the occasion of the 80th anniversary of the Allied landing in Normandy in World War II.

Martin Dvořák, Czech Minister of European Affairs, initiated a letter calling on the Belgian presidency of the Council of the European Union to accelerate progress in discussions for Ukraine and Moldova's EU accession.

US Vice President Kamala Harris and US National Security Advisor Jake Sullivan will represent the US at the Global Peace Summit in Switzerland on 15-16 June.

Lithuania's Foreign Minister Gabrielius Landsbergis believes that if Russia puts valid military targets in Belarus, Ukraine has the right to strike them.

Ukrainian President Volodymyr Zelenskyy arrived in Portugal on the afternoon of 28 May and is expected to hold meetings with the country’s leaders.

President Volodymyr Zelenskyy will visit Portugal on Tuesday, 28 May, at the invitation of the country's leadership.

On Friday 24 May, the United States may announce an additional package of US$275 million in military support to Ukraine.

Commenting on Kyiv's request to allow Ukraine to use US-delivered weapons to strike Russian territory, House Speaker Mike Johnson has said that the US should allow Ukraine to wage war "in the way they see fit."

Klaus Iohannis, President of Romania, has stated that a possible supply of a Romanian Patriot system for Ukraine must be approved by the Supreme Council of the National Defence, but it must not lead to a weakening of Romania's air defence.

The Swiss Federal Council issued an order on 22 May on enhanced security measures during the Ukraine Peace Summit in the resort of Bürgenstock on 15-16 June.