Top Indian wrestlers, who are protesting at the Jantar Mantar, wore black armbands on Thursday as a mark of protest over the alleged inaction of the authorities.
Asian Games gold medallist Vinesh Phogat had urged all the individuals and organisations supporting the wrestlers to join them in the black armband protest.
Country's premier wrestlers, including Bajrang Punia, Sakshi Malik and Vinesh, have been protesting for more than a fortnight, demanding the arrest of Singh for allegedly sexually harassing seven women wrestlers, including a minor.