The council convened at around 2:30 p.m. following a decision by President Andrzej Duda, state news agency PAP reported.
The National Security Council advises the president and includes senior officials such as the Speakers of both houses of parliament, the prime minister, the defence, interior and foreign ministers, and prominent politicians from both the government and opposition.
The head of the president’s National Security Bureau (BBN) is also a member of the National Security Council (RBN).
At Thursday’s meeting, which was being held behind closed doors in the Polish capital, Duda was expected to brief participants on the outcome of this week's NATO summit in Vilnius, Lithuania and the latest national security challenges resulting from Russia's ongoing invasion of neighbouring Ukraine.
NATO leaders meeting at a summit in the Lithuanian capital on Tuesday and Wednesday pledged to support Ukraine "for as long as it takes” and shortened Kyiv’s path to membership of the alliance, while the Group of Seven major industrialised countries unveiled new security assurances for Ukraine.
The Polish president told reporters on Wednesday that Russia posed the biggest threat to NATO allies and that any use of nuclear weapons by Moscow would be met with "an appropriate response."
Russia invaded Ukraine on February 24, 2022, launching the largest military campaign in Europe since World War II.
Thursday is day 505 of Russia’s war on Ukraine.
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Source: IAR, PAP