State BJP chief Arun Sao confirmed the development and said the party was unable to contact Sai at present but it would make all efforts to clear any misunderstanding he has.
In a blow to the opposition Bharatiya Janata Party in Chhattisgarh ahead of the Assembly elections scheduled at the end of the year, senior tribal leader Nand Kumar Sai on Sunday resigned from the party end an association of more than four decades.