India's Supreme Court on Wednesday confirmed the death sentence handed down to Mohammed Kasab, the lone surviving gunman from the 2008 Mumbai attacks in which 166 people were killed.

Pakistan-born Kasab, one of 10 gunmen who laid siege to India's financial capital in attacks that lasted nearly three days, had appealed against the sentence claiming that he had not received a fair trial.

"We are left with no option but to award death penalty," the two judges said in a court order. "The primary and foremost offense committed by Kasab is waging war against the government of India."