Maintaining that "there is more than what meets the eyes", Antulay said Karkare was investigating some cases in which "there are non-Muslims also", an apparent reference to the Malegaon blasts case in which sadhvi Pragya Thakur and a Lt-Colonel Shrikant Prasad Purohit were among the 11 persons to be arrested.
"Unfortunately his end came. It may be a separate inquiry how his (Karkare's) end came," he told reporters outside Parliament.
Antulay said "Karkare found that there are non-Muslims involved in the acts of terrorism during his investigations in some cases. Any person going to the roots of terror has always been the target, he said.
"Superficially speaking they (terrorists) had no reason to kill Karkare. Whether he (Karkare) was victim of terrorism or terrorism plus something. I do not know," he added.