According to sources, barring the arrest of two class 11 students of Kishtwar, who had reportedly sent the emails claiming responsibility for the terror attack, the NIA denied all other reports appearing in the media related to case.
http://ummid.com/news/2011/September/15.09.2011/nia_on_delhi_blast_leads.htm
http://ummid.com/news/2011/September/15.09.2011/nia_on_delhi_blast_leads.htm