The Uttar Pradesh Police formed an 18-member Special Investigation Team (SIT) to probe the death of Akhil Bharatiya Akhada Parishad president Mahant Narendra Giri and detained a disciple of the seer in Haridwar.
Meanwhile, Chief Minister Yogi Adityanath said all aspects related to the death are being investigated and the guilty will not be spared.
The seer, who was the president of the largest organisation of sadhus in India, was found hanging by his disciples at Baghambari Muth in Allahabad on Monday.