Kasab told special judge M L Tahilyani that an Indian man named Abu Jindal had taught him and the nine other slain terrorists Hindi during their training course in Lashkar-e-Tayiba camps in Pakistan.
This is for the first time that Kasab has claimed about the role of an Indian in the terror attack before the special court.
He had not revealed about Jindal or any other Indian in his statement before a magistrate and the police.
Reacting to Kasab's comment, Nikam said the gunman is deliberately making this statement. "He has some designs in making such a confession because earlier he had never disclosed the involvement of any Indian. I strongly suspect that he is not telling the truth," Nikam told PTI.
The court is yet to decide on whether or not it is going to accept Kasab's confession, Nikam said.