Deputies with the Ukrainian Democratic Alliance for Reforms (Udar), led by professional heavyweight boxer Vitali Klitschko, and members of the Batkivshchyna (Fatherland) and Svoboda (Liberty) parties said on March 5 that they were blocking the parliament's work to protest an attempt of the ruling Party of Regions to strip deputy Serhiy Vlasenko of his mandate.
Vlasenko is a lawyer of the jailed Batkivshchyna's leader, former Prime Minister Yulia Tymoshenko.
The deputies also said that some 20 deputies in parliament have dual citizenship, which is a violation of the constitution.
Last month, the three opposition factions blocked the parliament's podium for more than two weeks.
The row ended with the adoption of a new law requesting the physical presence of lawmakers during voting.