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.

President Volodymyr Zelenskyy had a telephone conversation with Austrian Chancellor Karl Nehammer on 22 May.

Annalena Baerbock, Minister of Foreign Affairs of Germany, has had to cancel her visit to the city of Kharkiv planned within her trip to Ukraine on 21 May due to the security situation.

Ukraine has a right to strike military targets on Russian Federation soil, and the US and its allies should support the country in doing so, said Victoria Nuland, former US Deputy Secretary of State, in an interview with ABC News after Russia's offensive in Kharkiv Oblast.

On 20 May, US Secretary of Defence Lloyd Austin launched the 22nd meeting of the Ukraine Defence Contact Group (also known as the Ramstein format), underlining the importance of ensuring a long-term supply of weaponry to Kyiv.

A sculpture dedicated to the 75th anniversary of the North Atlantic Alliance was unveiled on European Square in Kyiv on 16 May.

Representatives from 50 of the 160 countries and organisations who were invited to the Global Peace Summit in Switzerland have confirmed their attendance.

The account of Slovak Prime Minister Robert Fico has released a formal statement regarding  the assassination attempt on the official; the post states that he is in a "life-threatening" condition.

US Secretary of State Antony Blinken has stated that a potential bilateral security agreement with Ukraine will give military assistance in a variety of sectors, bringing the country closer to NATO membership.

During a telephone conversation with Ukrainian President Volodymyr Zelenskyy on 14 May, French leader Emmanuel Macron condemned Russia’s recent ramping up of attacks against Ukraine and said France would send additional weapons to Ukraine in the near future.