He, however, suggested Delhi Chief Minister Arvind Kejriwal to move Supreme Court to constitute the SIT, and "it should be monitored by the apex court."
"We have welcomed the suggestion made by Arvind Kejriwal for constituting the SIT, but he has no power for its formation and it lies with Union Home Minister or Lt Governor of Delhi," Singh told reporters here.
He said the reports of as many as nine Special Investigation Teams (SITs) in the past were yet to be implemented and no action was taken on it.