PM advisor on internal affairs Rehman Malik called on India to provide more details about 26/11 key handler Abu Jundal and said criminals using "fake" passports cannot be Pakistani.
Indian authorities have said that Ansari alias Abu Jundal, who is an Indian citizen, had travelled to Saudi Arabia on a Pakistani passport.
In recent interactions with the media, Malik has questioned whether the passport used by Ansari was genuine.
In another message posted on Twitter, Malik noted that "India had claimed earlier that (Jundal) had a Pakistani passport".
He said criminals using "fake" passports "cannot be Pakistani".
In yet another message, Malik said Pakistan "will continue to fully cooperate (with) India in the investigation of (Mumbai) terrorist attack. Pak and India need to identify their real enemy."
The two countries "need to know their real common enemy", he said.
He also raised questions about Pakistan-American terror suspect David Headley, asking "who funded him to produce movies of locations" in Mumbai.