MUMBAI (AFP) The lone surviving gunman of the 2008 Mumbai attacks could be executed this year if he does not appeal his death sentence, a senior Indian government official said on Tuesday. Mohammed Ajmal Amir Kasab, 22, was found guilty of waging war on India, mass murder, conspiracy and terrorism offences last week. Home secretary GK Pillai said Kasabs fate depended on whether he challenged the sentence through the higher courts and filed an appeal for clemency to the countrys president. If he doesnt file any appeal anywhere I think the chances of him getting hanged this year are quite high, he told the CNN-IBN news channel in an interview. The chief minister of Maharashtra state, of which Mumbai is the capital, said last week that he would push for the sentence to be carried out. We would want Kasab hanged at the earliest. We will ask the Supreme Court to fast-track the hearing of appeal, Ashok Chavan told the Hindustan Times newspaper.