"We did our work sincerely and registered cases and even arrested those people whose names were not mentioned in dossiers sent by India," he said.
He claimed the trial of the seven Pakistani suspects, including Lashkar-e-Taiba commander Zakiur Rehman Lakhvi, was in the "final stages" as some 20 witnesses had testified and been cross-examined.
The remaining witnesses were expected to be examined within two months, he added.
Authorities had earlier acknowledged that the conspiracy behind the Mumbai attacks was hatched on Pakistani soil.
The trial of the seven suspects, who have been charged with planning, financing and executing the attacks that killed 166 people, has progressed at a snail's pace due to repeated adjournments and various technical delays.
Though India blamed LeT founder Hafiz Mohammad Saeed for masterminding the attacks, Pakistan has refused to take action against him, saying the evidence provided by New Delhi is not adequate to prosecute him.
Officials have said the seven Pakistani suspects cannot be prosecuted unless the statements of the four Indian witnesses are brought on record.
This evidence can brought on record only if defence lawyers are allowed to cross-examine the witnesses.
