The leaders of the Nordic and Baltic centre-right parties that belong to the European People's Party are set to meet in Vilnius on Monday.
The meeting's organiser Gabrielius Landsbergis, the leader of the conservative Homeland Union – Lithuanian Christian Democrats, says he will ask for support to a boycott of the Astravyets nuclear power plant during the meeting.
The meeting will be attended by Norway's Prime Minister Erna Solberg, who is the chair of the country's Conservative Party, as well as her counterparts from Denmark, Finland, Latvia and Sweden.
Solberg was to meet with Lithuanian Prime Minister Saulius Skvernelis, but his office announced on Monday morning that the meeting was cancelled due to Skvernelis' health.
The Lithuanian prime minister has been diagnosed with lymphoma, a type of blood cancer, and allowed by the president to take leave of absence for treatment until November 8.