In the first attempt, Nazmul Hasan, son of a police constable, shot at Mohammad Alam in front of their residence at Nababer Bagh in Mirpur at about 9:30am. But the bullet hit his father, Abdur Razzak, who is now undergoing treatment at Dhaka Medical College Hospital (DMCH) with a wound in his hand.

"He (Nazmul) went there again at around 4:30pm to kill my son," Razzak told newsmen at the DMCH.

Tipped off, the RAT members waylaid and arrested Nazmul at Nababer Bagh area with US-made Petra-Brata pistol and seven rounds of bullets, a RAT official said.

Mirpur police identified Nazmul as a criminal but could not say how many cases are filed against him.