Several members of "Centennial Without Regime" Movement were detained overnight, the Founding Parliament NGO said in a statement.
The police detained the movement members for sticking leaflets informing of the Founding Parliament's May 30 rally. The activities were set free in three hours.
"Such nervous steps show that the authorities are in panic and fear the actions of the Founding Parliament that will result in a change of power in Armenia," the NGO said in the statement.