Senior IAS officer B K Prasad, Additional Secretary in the Home Ministry, heads the inquiry panel. The RTI application was filed with the Ministry seeking copies of reports submitted by the panel besides file related to extension in service given to Prasad.

"In this connection, it is requested that a proof of your Indian citizenship may please be provided," the Home Ministry said in its reply.

As per Right to Information Act, 2005, only Indian citizens can seek information. Usually, a proof of citizenship is not required to file an application under the transparency law. In rare cases, a public information officer can seek proof of nationality in case he has doubt over citizenship of an applicant.

"It is a way to block free flow of information and transparency by the government. Seeking proof of Indian citizenship must be discouraged. The Home Ministry appears to delay the information sought from it," said RTI activist Ajay Dubey.

Prasad, who heads the probe panel, is a 1983 batch IAS officer of Tamil Nadu cadre and was due to retire on May 31. He has been given two months extension in service till July 31.

Following an uproar in Parliament in March this year, the Home Ministry had asked Prasad to inquire into the whole matter of missing papers. The panel is yet to submit its report.

19-year-old Ishrat Jahan and three others were killed in an alleged fake encounter in Gujarat in 2004. The Gujarat Police had then said those killed were LeT terrorists and had come to Gujarat to assassinate the then Chief Minister Narendra Modi.

The probe panel has recently found a copy of a letter written by the then Home Secretary G K Pillai to the then Attorney General late G E Vahanvati from the hard disk of a computer of the Home Ministry, official sources said.

The papers, which disappeared from the Home Ministry, include the copy of an affidavit vetted by the then Attorney General and submitted in the Gujarat High Court in 2009 and the draft of the second affidavit vetted by the AG on which changes were made.

Two letters written by Pillai to Vahanvati and the copy of the draft affidavit have also so far remained untraceable.

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