Firoz Khan, one of the accused, had applied to the special TADA court seeking to become an approver and get pardon.
"We told the court that we don't want any approver in the case as there is enough evidence," Special Prosecutor Deepak Salvi told PTI.
Judge G A Sanap is likely to hear Khan's application tomorrow.
The court is hearing final arguments in the case.
Seven accused -- extradited gangsters Abu Salem, Mustafa Dosa, Karimullah Khan, Firoz Abdul Rashid Khan, Riyaz Siddiqui, Tahir Merchant and Abdul Quayyum -- are facing trial in the case in which the court had earlier convicted 100 men, including Bollywood actor Sanjay Dutt.
As many as 257 people were killed in thirteen powerful blasts in Mumbai on March 12, 1993.