"The sudden attack came as the members of the Industrial Police Unit were just setting up a makeshift check post at the Ashulia area on the Dhaka-Tangail highway," an official of Ashulia police station told PTI.
The station's duty officer said seven or eight assailants on three motorbikes appeared at the scene and indiscriminately stabbed the on duty policemen and fired gunshots in the air apparently to create a sense of panic and then fled.
"The locals rushed the two policemen to a private clinic from where our ambulance took them to Enam Medical College Hospital in Savar... Constable Mukul died there and the other constable Nur Alam is being treated with critical injury," police officer Nazmul Hassan said.
Savar industrial police's deputy director Kausar Shikder said three other constables were also injured in the attack and needed first aid at a local clinic.
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Ansar Al Islam, also known as Ansarullah Bangla Team (ABT) later claimed responsibilities for the attacks calling themselves as Bangladesh branch of Al-Qaeda.
"There could be a link between the attacks, we will definitely investigate the possible links," a police spokesman told PTI.
On October 22 night, an assistant sub-inspector was stabbed to death at a Gabtoli gateway to the capital.