The injured Giasuddin, 35, Samad, 35, and Shahjahan, 30, were admitted to Dhaka Medical College Hospital.

Sources said Alauddin, son of Babul, a staff of the bus service 'Neptune', demanded Tk 1,100 from 11 other staff including his father recently.

Accompanied by seven to eight cadres, he met bus supervisor Giasuddin at around 10.00am and asked him to pay the money.

At one point of altercations, Alauddin pulled out a knife from his pocket and stabbed in the right ear of Giasuddin.

As two other workers- Samad and Shahjahan- rushed to help Giasuddin, Alauddin also stabbed them in their hands.

Security personnel and policemen, stationed on the airport premises, caught Alauddin with knife and handed him over to Airport police station.