The suspect, who is believed to be aged 25, has now been detained following a standoff with police and the army. Our commandos had to act swiftly.
"There was no signal that he had something" when he went through airport security before Sunday's flight, Bangladesh civil aviation minister Mahbub Ali said at a news conference in Dhaka.
Khan said when the agency's bomb-disposal unit reached the scene, they found that Ahmed had fake "bomb-like material".
"There was no signal that he had something" when he boarded Sunday's flight, Ali said.
He forced pilots to land the Biman Bangladesh flight at gunpoint - before taking a crew member hostage and demanding to speak to the Prime Minister. RAB has entered the plane and they are trying to nab the hijackers.
"We tried to arrest him or get him to surrender but he refused and then we shot him", Maj.
Unconfirmed reports say that a gunman had tried to seize control of the cockpit, leading to the emergency landing.
The emergency exit was opened through which the passengers disembarked immediately.
After two tense hours, a commando operation put an end to the hijacking in about eight minutes. Heavily armed security personnel are guarding the plane. "We have to investigate how the man could board the aircraft in Dhaka with a gun or something that looked like a gun. We don't want to come to any conclusion right now", said the commissioner.
In a deadly attack claimed by the Islamic State group in 2016, terrorists killed 22 people including 18 foreigners at an upmarket cafe in Dhaka popular with Westerners.