Court upholds Mumbai gunman's death sentence

India's Supreme Court has upheld the death sentence of the only surviving gunman of the deadly 2008 Mumbai attacks that killed 166 people.

A Mumbai court had convicted 22-year-old Mohammed Ajmal Kasab of murder, waging war against India, conspiracy and terrorism in May 2010 and sentenced the Pakistani national to death. The sentence was confirmed by the state High Court in February last year.

Wednesday's Supreme Court order was expected. It was not immediately clear what Kasab's next step would be, but legally he can still appeal to India's president for mercy.

Kasab and nine other Pakistani gunmen rampaged through Mumbai for three days in November 2008 attacking two luxury hotels, a Jewish center and a packed train station.