The attacker confessed to the law enforcers that he attacked Professor Muhammed Zafar Iqbal as the teacher what he said is an enemy of Islam.
Lieutenant Colonel Ali Haider Azad Ahmed, CEO of Rapid Action Battalion-9, came up with the information while briefing reporters at Sylhet Ragib Rabeya Medical College and Hospital around 1:00am.
The attacker was admitted at Combined Medical Hospital of Sylhet.
He is not disclosing correct informing about his identity, said the official.
The attacker was identified as Faizur Rahman, son of Atikur Rahman, a resident of Kaliar Kapon, of Derai in Sunamganj and a madrasa student.
He has been residing with his family members at Sheikh Para in Kumargaon area of the city. His father teaches at Tukerbazar Mahila Madrassah.
The noted writer received injuries in the knife attack on the campus on Saturday afternoon.
He is now undergoing treatment at the Combined Military Hospital of the capital.
Zafar Iqbal, who was seriously injured in the knife attack on the campus on Saturday afternoon, is now undergoing treatment at the Combined Military Hospital in Dhaka.
SUST assistant proctor Abu Hena Pahil said a young man, aged around 24-25, swooped on Professor Zafar Iqbal around 5:40pm while he was delivering his speech on the closing day of a two-day celebration programme, ‘Robofight,’ of the Electrical and Electronic Engineering department at Mukta Mancha.
The celebrated writer was first taken to Sylhet MAG Osmani Medical College and Hospital and kept at the Intensive Care Unit where doctors said he was out of danger.
Later, Zafar Iqbal was airlifted to the Combined Military Hospital in Dhaka following the directive of prime minister Sheikh Hasina. An air ambulance carrying him left Osmani International Airport around 10:00pm.
A constable, Ibrahim, was also injured while trying to catch the attacker.
Soon after the incident, SUST students caught the attacker from the Shikkha Bhaban-1 after the attack and gave him a mass beating before handing him over to police.
Protesting at the attack on the noted writer, general students of the university under the banner of Sammilita Sanskritik Jote formed a human chain in front of central library around 12:00pm.