The tragic incident which occurred at 2:30pm attracted some residents to the scene after hearing the gun shot.
The deceased and his brother were said to be playing in their grandfather's room when the incident occurred.
Speaking to silveronline24.com, Rite FM's reporter, Austin Ofori Addo, said, the grandfather of the children Benjamin Tetteh, 70, an ex- military officer had left them to buy food when he heard the news that there had been a gun shot in his room.
A rush to the scene by the shivering granny saw the deceased Alex Ologo Amanor in a pool of blood after being hit in the head by his brother.
Austin Ofori Addo said, the suspect, Jerry Amanor purportedly took his grandfather's unregistered single barrelled gun that had a pellet in and unintentionally shot his brother in the head.
The grandfather is currently in police custody, assisting police in their investigations whiles the body of the deceased has been deposited at Atua Government Hospital morgue.