The CBI has decided not to challenge the Supreme Court order, through a review petition, quashing the alleged disproportionate assets case against former UP chief minister Mayawati.

The agency has decided not to file any review petition after receiving legal opinion from its directorate of prosecution which said the option would not be feasible, CBI sources said.

The Supreme Court on July 6 had quashed a nine-year-long disproportionate assets case against her and pulled up the CBI for exceeding its jurisdiction by lodging an FIR against her without any direction from it.

The apex court had said the DA case against Mayawati was "unwarranted".