Home Minister P Chidambaram on Monday said he cannot confirm or deny the involvement of any Indian in the November 26,2008 terror attack in Mumbai. I cant confirm nor deny, he told reporters when asked about reports about a resident of Maharashtra playing a key role in guiding the operations of the team that attacked the financial metropolis. He was replying to a question on whether an Indian national Syed Zabiuddin Syed Zakiuddin Ansari was present in Lashkar-e-Taibas control room during the attack.