The SIT is also likely to recommend departmental action against some serving and retired police officials who have been grilled in the probe so far or whose links have been established with the scam, they said.
"The findings of the scientific tests have to be verified and we may question some more persons in this connection", a SIT official told PTI adding that the interrogation could be in the form of personal quizzing or seeking feedback through a questionnaire.
Former Maharashtra Deputy Chief Minister Chhagan Bhujbal and former Chief Minister Vilasrao Deshmukh today said the SIT has not sought any information or clarification from them in regard to the stamps scam.
They also said so far they have neither been summoned nor has the SIT sent them a questionnaire.
SIT sources said that the probe into the fake stamps scam is now in an advanced stage and it is a matter of few weeks before the probe is wound up.
According to them, the SIT is likely to recommend to the government to initiate action against some serving and retired police officers against whom it has collected evidence of involvement in the scam.
The scientific tests - namely the P-300 brain mapping and the narco analysis tests - conducted on scamster Telgi have disclosed that Telgi admitted proximity to Deshmukh and Bhujbal, although both of them have denied it.
The tests also shed light on various aspects of the scam like payments made to police officers and politicians, threat to Telgi's life, and, favours granted to Telgi during his stay in police lock up.
The reports, that have stirred the hornet's nest, have been presented in the special MCOCA court along with the chargesheet filed earlier this month.