Ahead of Jharkhand assembly elections, Union Minister and Bharatiya Janata Party (BJP) leader Shivraj Singh Chouhan on Friday lashed out at the Jharkhand Mukti Morcha (JMM) over the welfare of tribals and stated that the tribal population in Santhal has decreased from 44 per cent to 28 per cent. He added that the tribal society has become a minority in Pakur.