Announcing his arrival on X, formerly known as Twitter, Zelensky said he would go on to Latvia and Estonia in the coming days. All three Baltic states are members of the EU and the Nato military alliance.

“Security, EU and NATO integration, cooperation on electronic warfare and drones, and further coordination of European support are all on the agenda,” Zelensky said.

Zelensky and Lithuania’s president Gitanas Nauseda are due to hold talks and a joint press conference was scheduled for 1.25pm local time. The Ukrainian leader will also give a public speech, Nauseda’s office said.

Zelensky arrived on the previously unannounced visit to Vilnius, a staunch supporter of Kyiv, as the second anniversary of Russia’s full-scale invasion of Ukraine approaches.

With the prospects of a protracted war growing, Ukraine has been appealing to its Western allies for more financial and military assistance.

“The presidents will discuss the war in Ukraine, support for Ukraine, and its integration in the European Union and Nato,” Nauseda’s office said in a statement.