Central security agencies are looking into a large espionage angle in the case of a Major posted in Andaman and Nicobar Islands from whose computer sensitive files and information were allegedly passed on to Pakistan, in which more army personnel are likely to be in the dock.

Official sources told reporters here that investigators have found over 2,500 files in the Major's computer, which were not supposed to be in his possession.

"The officer could not have had access to all the defence files. We are looking into who all might have given him the files which could also have been in good faith," the sources said.

The National Investigation Agency (NIA) has started questioning the Major once again since this morning with regard to the files he had in his possession and is also asking questions regarding how he came into possession of these files and who had shared these with him.

Also, even when the computer was seized, some files were deleted, they said, adding the entire matter needed a "substantial level" of investigation.

"What is most disturbing was the fact that even when the computer was kept in the custody of authorities some files were deleted," a source said.

Meanwhile, officials at the Army headquarters said the investigations into the episode was being jointly done by the NIA and the military intelligence and the espionage angle has not yet been established.

The officials said the probe was yet to be completed and a final outcome would be known only when the investigation report was submitted.

Meanwhile, officials at the Army headquarters said the investigations into the episode was being jointly done by the NIA and the military intelligence and the espionage angle has not yet been established.

The officials said the probe was yet to be completed and a final outcome would be known only when the investigation report was submitted.

They also said the claim that the major's computer had 2,500 files was not proved and that it could be only 2,500 pages.

They also said the Army was not aware of any file being deleted after the computer was seized and handed over to the forensic laboratory in Hyderabad.