New Delhi: A government panel is likely to decide on whether to declassify more files on Netaji Subhas Chandra Bose, amid a controversy that the late leader’s relatives were snooped on for several years.

On Thursday, an inter-ministerial committee headed by the Cabinet Secretary is scheduld to review the Official Secrets Act in connection with the files.

According to reports, there are about 58 files linked to Netaji with the PMO and about 25 with the External Affairs Ministry.

Earlier, on Tuesday Prime Minister Narendra Modi met Surya Bose, the grand nephew of Netaji Subhash Chandra Bose, in Berlin and assured him that he will look into the surveillance issue amid a growing demand by involved parties to declassify the files.

"He said he will look into it seriously and then make a decision. He said he will try his best to open them up because he himself hasn't yet seen any of those files. So, he cannot judge what the contents are like, what they could be. So, it was a very honest answer I must say," he added.

Read: Declassify Netaji files, family to tell Narendra Modi in Germany

Bose also stressed that the files may not contain much of substance, but it might be possible that something much worse than the surveillance might come out of it.

"That is a difficult thing to guess because you don't know what's in those files. There may be nothing much of substance in there, but again something much worse than the surveillance might come out of it. On the other hand, there may be some disappointing news about our great leader. So, you don't know. It's a guess work we can do," he added.

Earlier, two recently declassified IB files had revealed that the former prime minister Jawaharlal Nehru-led government had order surveillance on Netaji's kin between 1948 and 1968. The files reveal that the IB had resumed British-era surveillance on the two Bose family homes in Calcutta at Woodburn Park and Elgin Road.

Bose’s relatives believe that the freedom fighter did not die in an air crash in Taipei in 1945.