A Senate Select Committee has ordered NBN Co executives to attend a public hearing in Canberra on Wednesday, the day before the government is due to release NBN Co’s strategic review.

Malcolm Turnbull accused the committee chair, Stephen Conroy, of trying to ‘‘disrupt’’ the strategic review by demanding NBN Co appear the day before the review was released instead of taking up an offer to hold the hearing on Friday.

Senator Stephen Conroy asks a question of Dr Ziggy Switkowski, Executive Chairman of NBN Co, during the Senate Select Committee hearing on the NBN on Friday 29 November 2013. Credit:Alex Ellinghausen

‘‘Senator Conroy's demand that the executive team attend tomorrow is designed to do nothing other than disrupt the completion of the Strategic Review which, as he knows, will be finally approved by the Board of NBN Co on Thursday morning,’’ the Communications Minister told Fairfax Media.

This would be NBN Co’s second appearance before the committee, chaired by former Communications Minister Senator Conroy, in as many weeks.