According to the Polish Press Agency PAP sources, the prime minister addressed what has been described as a "crypto scandal" and alleged "Russian links" within it.
MPs were due to return to open session at 11:30 to debate President Karol Nawrocki’s veto of the crypto-asset market bill, with a vote expected between 13:15 and 13:30.
Governing coalition MPs described the confidential briefing as detailed and consistent.
Mariusz Witczak of Civic Coalition (KO) said the prime minister had presented "concrete information that gave a very precise picture of the threat."
His colleague Jarosław Urbaniak added that "if MPs listened carefully and act in good conscience, the fate of the president’s veto is already decided."
Opposition lawmakers offered a sharply different assessment.
Bartosz Kownacki of Law and Justice (PiS) called the session "predictable" and said "it did not justify being held in secret."
Sebastian Kaleta, also from PiS, argued that "the session should have been public; Poles had a right to see what happened."
After 15:00, the Sejm will begin a new sitting featuring votes on several items, including amendments to next year’s budget.
Lawmakers are also due to hold the first reading of a government deregulation plan affecting cooperative banks, scrapping certain reporting obligations to the financial regulator.
(ał)
Source: PAP