Police had arrested Singh at Mir Bazar in Kulgam district of south Kashmir along with Hizbul Mujahideen terrorists.
The Centre on Thursday reappointed retired IPS officer Farooq Khan and former bureaucrat KK Sharma as advisers to the administrator of Jammu and Kashmir. Khan and Sharma were earlier advisers to Satya
A senior administration official said that these leaders were never detained and were free to participate in political activities.
Posters have appeared in Srinagar warning people to keep their children away from schools after the Centre abrogated Jammu and Kashmir's special status last month.
Farooq Khan's remarks came on a day UN Human Rights chief Michelle Bachelet expressed concern on the restrictions and asked India to ease the current lockdown.