The leaders of parliamentary opposition factions have said that the vote in the Verkhovna Rada on Thursday was illegitimate and described this as an overthrow of constitutional order in Ukraine and the seizure of power in the country.

"We are appealing to the international community: the regime of [President] Viktor Yanukovych and the Party of Regions has completely destroyed state power in Ukraine. This is nothing else than the overthrow of the constitutional order and the seizure of power in the country," Batkivschyna faction leader Arseniy Yatseniuk told journalists in Kyiv on Thursday.

He said that neither Verkhovna Rada Chairman Volodymyr Rybak nor Ukrainian President Viktor Yanukovych has the right to sign the laws adopted on Thursday.

Yatseniuk predicted that after the events that occurred in the session hall of the Ukrainian parliament, Ukraine expects a second wave of protests.

Svoboda faction leader Oleh Tiahnybok said that now only the people should have their say.

He also agreed with Yatseniuk that there was a coup and usurpation of power in the state.

UDAR Party leader Vitali Klitschko said that if the laws passed by parliament are signed by the parliament speaker and the president, "we will initiate a referendum on a vote of no-confidence in Rybak and the president."

Yatseniuk also said that the opposition's demand on the unacceptability of the signing of the adopted laws had been passed to the parliament's leadership.

"We have just passed a special statement in accordance with the law of Ukraine on the rules of procedure, which prohibits the Verkhovna Rada chairman to sign a law that was allegedly passed in the Verkhovna Rada and which obliges him to return deputies to the session hall and hold the voting procedure, as determined by the law and the constitution," Yatseniuk said.