Asif Mahmud and Md Abu Baker Majumder, two coordinators of Anti-discriminatory Student Movement, claimed on Wednesday that they were picked up on July 19 and released after four days on Wednesday.
They, however, did not directly blame anybody for the incident.
Asif and Baker in separate posts on their Facebook accounts said they were undergoing treatment and would reveal details of the incidents after getting better.
Asif said he was picked up from Hatirjheel area at around 11:00pm on July 19 and pressurised to postpone the quota protest movement that spread across the country.
"When I refused to oblige, they pushed an injection and made me senseless. As soon as I regained consciousness, they pushed one more injection to make me senseless during the last four to five days," Asif said.
They dropped me at around 11:00am on Wednesday in the same place from where they picked me up earlier, Asif added.
Asif said he discovered himself blindfolded with padded cloth. Baker said he was picked up from an alley at Dhanmondi on July 19.
"As I refused to give statement to stop the movement, they confined me in a dark room for the last four days," he said.
Baker said he discovered himself blindfolded on Wednesday from an adjacent area of the spot from where he was picked up.
Both of them are now with their respective family members, according to their Facebook posts.
Earlier, other coordinators of the Anti-discriminatory Student Movement alleged that their fellows including Asif and Baker were missing since July 19.
