"Uskey baarey mein yehi kehna hai ki woh sahab Pakistan mein nahin hain (The only thing I have to say about that gentleman is that he is not in Pakistan)," Basit said.
He was responding to a question at a "Meet the Press" event organised by UP Press Club here.
Basit was asked to comment on Singh's statement in Lok Sabha earlier in the day that the 1993 Mumbai blast mastermind was in Pakistan and the government will do everything to bring him to justice.
He alleged that Pakistan has "failed" to track him down despite being provided with "overwhelming evidence" about his presence there, based on "credible information".