New Delhi, Jan 18 (ANI): India said that extremist groups trying to deter domestic stability and internal security of Afghanistan are a key threat to the war-torn country's 2014 presidential polls scheduled for April, as the US plans a total pull-out of combat forces by this year end in absence of bilateral security agreement. India's foreign secretary, Sujatha Singh, expressed such views at the meeting of special officers from neighbouring countries of Afghanistan and other international agencies to discuss on 'Istanbul process' in New Delhi. Appreciating the efforts of Afghan President, Hamid Karzai, towards conducting the polls, Singh said the extremist groups could pose a threat to the elections. Singh also said that any initiative taken towards the Afghanistan's stability should not have inadequate preparations.