Home Minister Amit Shah today hit out at the Congress over its claim that there is no documented evidence of Lord Mountbatten, C Rajagopalachari and Jawaharlal Nehru describing the 'Sengol' as a symbol of the transfer of power by the British to India. Several top BJP leaders and Ministers have also launched fresh attacks on the Congress and other Opposition parties for announcing that they would boycott the inauguration of the new Parliament building.