Additional District and Session’s Judge SM Nasim Reza also fined the convicts Tk 10,000 each and in case of failure to pay the fine, they will have to serve two more years in jail.
The lifers are Torab Ali, Suruj Mia, Ali Mohammad and Korom Ali of the village.
According to the prosecution, two groups of people -- one led by Ali Mohammad and the other by Korom Ali -– had long been at loggerheads over property-related dispute.
As a sequel of the dispute, both the groups locked into a clash on September 29, 1998 that left three people -- Nur Mohammad of Ali Mohammad group, and Shamsul Haque and Afil Uddin of Korom Ali group dead.
Ali Mohammad lodged a case accusing 100 people over the killing of Nur Mohammad while Atiqunnesa filed another case against 46 people over the murder of Afil Uddin and Shamsul Haque.
In the Afil and Shamsul killing case, Torab Ali, Suruj Mia and Ali Mohammad were given life imprisonment while Korom Ali was awarded life in prison in the Nur Mohammad murder case.