As per sources, the younger brother, identified as Jintu Das (20) bludgeoned his elder brother, Kamal Das (22), to death with a rod when the latter was asleep.
The duo reportedly had a fight during the day as Jintu tried to sell a cylinder from the house due to lack of cash.
Sources said Jintu is a drug addict.
Meanwhile, Chandmari police reached the spot and took stock of the situation.