The agency filed an application in this regard before Additional Sessions Judge Reetesh Singh who extended till October 17 the judicial custody of alleged LeT members Abdul Subhan and his nephew Asahbuddin arrested in connection with the case.
The court would also hear the arguments on the plea filed by the police on October 17.
Subhan and Asahbuddin were produced before the court on expiry of their judicial custody.
With their arrest, police had claimed to have unearthed a terror module of LeT which was at an "advanced stage" of planning a major strike in Delhi.
Subhan was arrested by the Special Cell of Delhi Police on May 20 while Asahbuddin, who was serving life term in Kolkata for his role in the Partha Roy Burman kidnapping case of 2001, was arrested here on May 27 after he was brought from there.