NEW DELHI, April 10 (Xinhua) -- Indian Prime Minister Manmohan Singh Friday said that India has not decided whether to join a U.S.-proposed regional contact group on Afghanistan, according to a report by the private Indo-Asian News Service.

    Singh told a media forum with the local women's press corps that while the United States has discussed with India about the latter's participation in such a contact group, India has not "taken a final view" about it, according to the news service.

    The U.S. President Barack Obama suggested in his new policy unveiled on Afghanistan and Pakistan last month the forming of a contact group on Afghanistan with participation of India, Russia, China, Iran, Saudi Arabia and other Gulf nations

    Singh also denied that the U.S. is exerting pressure on India to restart talks with Pakistan and said India will not resume its composite dialogue with Pakistan until Islamabad shows "sincere evidence" to punish those involved in the Mumbai attacks.

    "This dialogue cannot resume unless Pakistan gives sincere evidence of its willingness to prosecute all those involved in the Mumbai attacks," he was quoted as saying by the news service.

    India suspended composite dialogue with Pakistan after the Nov.26, 2008, Mumbai terror attacks, blaming Pakistan for failing to stop terrorists from launching attacks from its soil.