A group of lawmakers in the ruling Saenuri Party who support President Park Geun-hye's ouster said Tuesday they have completed all preparation for her impeachment, adding the scenario of having her step down voluntarily by April is no longer an option.

The dissenters' group in Saenrui has been embroiled in a conflict with Park loyalists, who claim that the president should step down on her own in April and the presidential election should be held in June instead of December.

While the group earlier said it is also open to the option, it later backtracked and said its members will join the impeachment vote slated for Friday.

The successful passage of the impeachment motion calls for approval from at least 200 lawmakers in the 300-seat National Assembly. If every single opposition and independent lawmaker is to vote for the ouster, the passage still calls for support from at least 28 members from Saenuri.

The dissenters' group said they have secured enough Saenuri member votes to pass the motion, adding it has at least 40 lawmakers, although the figure remains controversial. (Yonhap)