The three main Opposition parties of South Korea on Wednesday agreed to continue with their plan to impeach President Park Geun-hye, AP reported. The three parties also dismissed Park’s conditional resignation offer on Tuesday, calling it a stalling tactic. On November 20, prosecutors said they would investigate Park in connection with a political corruption scandal.

The three parties called on Park to step down immediately and unconditionally. Democratic Party leader Choo Mi-ae said the South Korean public did not “want to enter the new year with Park Geun-hye as president”. “There is only one way under our constitution to halt a term of a president and that’s an impeachment motion,” Choo said.

The parties also agreed to bring an impeachment motion to the country’s parliament when it meets on December 9. The move will need the support of two-thirds of the 300-member-strong parliament to succeed. The opposition parties currently have the support of 172 legislators, which means that they will also require help from dissenters within Park’s own Saenuri Party.

If impeached, the president’s powers will be immediately suspended while a Constitutional Court deliberates on the matter. The court will have to announce its ruling within 180 days. On Tuesday, Park had asked the Parliament to find a way to facilitate a transition after she steps down from her post.

The president has been accused accused of colluding with Choi Soon-sil, a longtime friend and confidante, to extort money in the form of donations from companies in South Korea. The money, which was transferred to non-profit foundations controlled by Choi, was allegedly used for her personal gain. Park has also been accused of ordering her aides to leak official state documents to Choi, who has no official position in the South Korean government.