Rapid Action Battalion members have picked up four youths over the sexual harassment of a female student of Chattogram University.
They were apprehended during a series of raids in different parts of Chattogram on Friday.
Lt Col MA Yusuf, captain of RAB-7, confirmed.
He said: "We have held four people in connection with the incident at Chattogram University. They are being processed."
He, however, did not reveal the names of the arrestees but said the 'mastermind' behind the incident was among them.
Details will be disclosed at a news briefing later in the day.
A female student and her friend were allegedly stopped by five strangers while they were returning to the hall from the university's Hotashar Mor area on the night of July 17.
The miscreants forcibly took them to the Botanical Garden and harassed them. They photographed the incident and threatened to spread them on the internet.
They allegedly tried to rape the girl as well.