Harun bin Izhar Chowdhury, son of Hefajat-e Islam nayeb-e-ameer Mufti Izharul Islam Chowdhury, was placed on a 10-day remand on Wednesday in two separate cases.
Chittagong Metropolitan Magistrate Mashfiqul Islam passed the remand order after police produced him before him.
The court also granted remand for three days for each of other five people held in the cases filed under explosives act and for preserving acid in the madrasa.
Police arrested Harun, one of the prime accused of Monday’s bomb blast in a Chittagong madrasa earlier in the day
Meanwhile, Jubair Ahmed, 25, a student of Jamiatul Ulum Al Islamia Madrasa where the explosion took place, succumbed to his burn injuries at Chittagong Medical College and Hospital (CMCH) early Wednesday, reports our Chittagong correspondent.
Jubair died around 6:00am after fighting for life for the last two days at the burn unit of CMCH, said Sub-Inspector Zahirul Islam, in-charge of CMCH police camp.
He had suffered 80 percent burn injuries, the police official said.
Victim Jubair, son of Makbul Hossain of Habiganj, on Tuesday told our correspondent that he got admission to the madrasa just eight days ago.
Earlier on Tuesday, Md Habibur Rahman, 24, another student of the madrasa who sustained burn injuries during the blast died at the hospital.
Izharul, the founder and principal of the madrasa, is also a suspected activist of banned militant outfit Harkatul Jihad al Islami (Huji).
At least seven students were injured in the explosion on second-floor of the four-storey dormitory of the madrasa in Lalkhan Bazar of Chittagong around 11:30am Monday.
Police have also found the remains of grenade-like explosives on the room where the explosion took place.
Khulshi police arrested Harun, publicity secretary of Hefajat, a Qaumi madrasa-based organisation, along with Zunayed, one of his associates, around 3:30am at a house in Hathazari upazila of the port city.
Police on secret information conducted the drive at Ishapur village in the upazila and made the arrest, said Mainul Islam, officer-in-charge of Khulshi Police Station.
Harun and his father Izharul, another prime accused in the blast, went into hiding before police filed two cases in connection with the explosion Tuesday morning.
Police filed the cases — one under the explosives act and the other for preserving acid in the madrasa — against some 12 people where the father and son were named as the prime accused.
Police also recovered a handmade grenade at the madrasa compound on Tuesday.
After their hiding, Md Shahidullah, additional deputy commissioner of Chittagong Metropolitan Police (north zone), who led the drive, said they did not immediately arrest the duo as they failed to understand what actually had happened.
Sanwar Hossain, chief of the Detective Branch’s bomb disposal team, told The Daily Star Tuesday that samples collected from the spot were being brought to Dhaka for a detailed study.
After examining the samples, the police would be able to say what caused the explosion.
Immediately after the blast, Izharul claimed that it originated from a laptop charger while Harun claimed that it was from an instant power supply (IPS).