A female opposition protester was repeatedly struck by water cannon before finally being removed from a concrete wall by fellow demonstrators on Tuesday.
The wall was built by authorities to keep protesters from getting close to the parliament in Beirut.
The demonstrators were rallying against the new cabinet, which is expected to submit its new policy statement ahead of a vote of confidence.
Demonstrators have been calling for an end to the current political class that they consider corrupt and incompetent, amid Lebanon’s ongoing financial crisis.
Thirteen consecutive days of protests at the end of October already helped force the resignation of Prime Minister Saad Hariri.