NEW DELHI: Former PM Manmohan Singh will move the Supreme Court next week to quash the CBI special court summons in the coal allocation case.

Former Union minister Kapil Sibal and Supreme Court lawyer K T S Tulsi will appear in court on his behalf.

The former Prime Minister has been made an accused in the case related to the allotment of coal blocks during his term at the helm of the previous UPA regime.

The option of moving Delhi HC to challenge the trial court decision, the normal course of grievance redressal in a three-tier justice delivery system, is ruled out because of a July 25, 2014 apex court order, which monitored the CBI probe into the alleged irregular coal block allotments during the UPA and previous NDA governments and cancelled all 214 allocations during that period.

"We make it clear that any prayer for stay or impeding the progress in the investigation/trial can be made only before this court and no other court shall entertain the same," the July 25 order said.

The Congress party has vowed to fight the case politically and legally.