South African MPs on Wednesday expressed "grave concern" over the delay in releasing the terms of reference with regard to the Commission of Inquiry into state capture. President Jacob Zuma must issue the terms of reference as a matter of urgency and this must be based on the remedial action of former Public Protector Thuli Madonsela's report on state capture, said Mathole Motshekga, Chairperson of Parliament's Portfolio Committee on Justice and Correctional Services.