The fire was brought under control by three firefighting units
RAB-14 Kishoreganj camp chief Hasan Mostafa Swapan said the elite force arrested the 67-year old war criminal Hafiz Uddin from Barshikura village of Itna in Kishorganj on Saturday.
The charges against them included abduction, murder, torture, looting and arson attack.
The three other death-sentenced convicts are ATM Shamsuddin Ahmed, his brother former army officer ATM Nasir Uddin Ahmed and Gazi abdul Mannan, all from Karimganj Upazila.
Azharul Islam from the same Upazila got the lifetime imprisonment.
Among the convicts, Shamsuddin is on death row, and Mannan died while absconding last year. Nasir is still absconding.