It appears that Vishal Kumar Singh (21) had an affair with the daughter of his uncle Santosh Kumar Singh (45), something that the warden must have disapproved of, Superintendent of City (West), Patna, Ravinder Kumar, told PTI.
The assailant committed suicide by shooting himself after killing his maternal uncle at the police quarters, Kumar said.
"It is not fully clear as to what caused the young man to behave so recklessly. Though prima facie it appears that he had an affair with the jail warden's daughter. We are still investigating the matter," the SP said.
"Vishal shot himself immediately after firing at his uncle. Hearing the sound of gunshots, people living in the neighbourhood informed the police. The policemen reached the spot only to find the uncle-nephew duo lying in a pool of blood," the SP said, adding that they were taken to a hospital, where they were declared 'brought dead'.