A case was today registered by Delhi's Anti-Corruption Branch (ACB) in connection with the alleged 400-crore water tanker scam linking former Delhi Chief Minister Sheila Dikshit. ACB chief M K Meena said two complaints were received with regard to the scam and those named in the complaints include Dikshit and Delhi Chief Minister Arvind Kejriwal. He said both Dikshit and Kejriwal will be quizzed.