Victims' organisations have strongly opposed the proposed demolition of the defunct Union Carbide plant in Bhopal, which killed thousands and maimed lakhs, following the leakage of the deadly Methyl-Iso-Cyanate gas on December 2-3, 1984. "It is an attempt to weaken the criminal case pending in the sessions court as the defunct plant is important evidence in the case against Union Carbide," Gas Peedit Sangharsh Sahyog Samiti Convenor Sadhna Karnik told PTI.