The meeting gathered about two hundred people.
The press was not allowed, but deputies Oleksandra Kuzhel, Serhii Pashynsky, Liudmyla Denisova and Tetiana Sliuz have entered the premises.
Pashynskyy proposed to hold similar meetings in the Palace of Sports, as the meeting room can accommodate only 15 people and is only 20 square meters.
The interests of Vlasenko will be defended by Arseniy Yatsenyuk and Batkivschyna lawyer Mykola Tytarenko.
On Tuesday, the highest administrative court will consider the suit of depriving Vlasenko of his parliamentary mandate.