New Delhi, Apr 1 : The Supreme Court on Wednesday postponed the hearing on the petition filed by Uttar Pradesh Chief Minister Mulayam Singh Yadav and his family members challenging the institution of an inquiry by the Central Bureau of Investigation (CBI) in the disproportionate assets case.

A Bench of Justices Altmas Kabir and H L Dattu delayed the hearing as the judgment of a Constitution Bench on the authenticity of the court ordering CBI probe is awaited in the first week of May.

Yadav, along with his two sons, Akhilesh Yadav and Prateek Yadav and his daughter-in-law Dimple Yadav, had filed a review petition questioning the Supreme Court''s earlier directive to the CBI to investigate the disproportionate assets case as claimed in a Public Interest Litigation (PIL).

The PIL was filed by Vishwanath Chaturvedi, an advocate, seeking probe into the disproportionate assets accumulated by Yadav and his family members.

The Constitution Bench has to judge the power of High Courts and the Supreme Court to order a CBI inquiry.

The petitioners argue that under the Delhi Police (Special) Establishments Act, only the Union Government can order the CBI probe with the consent of the respective state governments. (ANI)