With the Centre removing Tamil Nadu's delta regions from the coal blocks auctioning, state BJP chief K Annamalai on Saturday thanked the former for doing so on the 'request' of the party's state unit. Union Minister Pralhad Joshi, who also holds the Coal and Mines portfolio had tweeted that the decision to exclude Tamil Nadu from the auctioning ambit was taken in the interest of the people of the state after Annamalai had flagged the matter with him.