The agency sleuths, who are questioning the gangster, said Salem was fairly cooperative during the interrogation that entered its second day on Sunday.
Keeping its cards close to the chest on subjecting Salem to scientific tests like polygraph, brain-mapping etc, the CBI said it does not rule out such a possibility, but added nothing has been decided yet on the issue.
We do not rule out the possibility. But we already have enough evidence against him. That is what helped in getting this gangster extradited, a senior CBI official said.
However, the gangsters lawyer has rejected the claim that Abu Salem had confessed to his involvement in the 1993 blasts.
We have already told the court that the accused does not intend to give a confessional statement, Salems lawyer OA Siddiqui told a television channel here.
However, he said his client would cooperate with the CBI in its ongoing probe.
The CBI officials said although they were tackling a tough criminal, he was cooperating in the interrogation and helping them in the 1993 serial bomb blasts probe.
Our focus (of questioning) is on 1993 blasts, the official said but refused to divulge the details of interrogation held so far.
The official also refused to comment on media reports that Salem had divulged names of some politicians and Bollywood personalities during the course of the interrogation.
The CBI official also said that no question seeking whereabouts of fugitive underworld don, Dawood Ibrahim, was posed to Salem in the past two days.