"Kasab has killed so many innocent people. For how many days, should we take care of him is the question doing rounds in my mind," he said while addressing a crowd at the launch of a book in Mumbai.
He further said that the terrorists needed to be taught lessons by setting up a time frame in delivering justice and sending across strong message to those plotting and executing terror activities.
"The law is same for the people here and as well as for terrorists coming from across the border and killing innocent people. There is a need to give a thought about existing laws (so as to strengthen them)," he said.
Ajmal Kasab was sentenced to death by a special court on May 6, 2010. The death sentence was, however, upheld by the Bombay High Court on February 21, 2011.