Poland's lower house of parliament on Wednesday voted to relieve eight members of the commission of their duties on Wednesday, state news agency PAP reported.
The ninth member of the panel resigned from his post, according to officials.
The move was backed by MPs from the liberal Civic Coalition (KO), the rural-based Polish People's Party (PSL), the centre-right Poland 2050 group, the Left party and some lawmakers with the far-right Confederation group.
Votes against were cast mainly by MPs from the ruling conservative Law and Justice (PiS) party, public broadcaster Polish Radio's IAR news agency reported.
Earlier in the day, the commission, which was appointed by the previous, Law and Justice-controlled parliament, unveiled a progress report from its work so far, the PAP news agency reported.
The panel said that Poland's Military Counterintelligence Service (SKW) had maintained close contacts with Russia's Federal Security Service FSB between 2010 and 2014, without the formal consent of then-Prime Minister Donald Tusk.
The commission recommended that Tusk and senior ministers in his Cabinet at the time "should not be appointed to positions with responsibility for national security."
Tusk, a former top European Union official and Poland's opposition leader, who is likely to be elected the country's next head of government, said the commission's recommendations "came as no surprise."
He told the media that the creation of the panel had been "politically motivated" and the commission's report "proves this," the PAP news agency reported.
(pm/gs)
Source: IAR, PAP