Hezbollah stepped up accusations against the LF on Friday, saying it killed the seven Shi'ites to try to drag the country into a civil war.
The head of the Christian Lebanese Forces party (LF) denied late on Friday his group had planned street violence in Beirut that killed seven people, and said a meeting held the day before was purely political.
Thursday's violence, which began as people were gathering for a protest called by Shi'ite Muslim group Hezbollah against the judge investigating last year's Beirut port blast, was the worst in over a decade and stirred memories of the country's ruinous sectarian civil war from 1975-90.
Samir Geagea told Voice of Beirut International radio that a meeting held on Wednesday by a political grouping the LF belongs to had discussed action options should Iran-backed Hezbollah succeed in efforts to remove the judge.