Parmanand Persaud of Lot 148 Station Street, Kitty Georgetown is in critical condition at the Georgetown Public Hospital (GPHC) following a fight with his brother on Sunday evening at Diamond New Housing Scheme, East Bank Demerara.His brother is in Police custody.Based on information received, the injured 26-year-old was invited to his brother’s house to celebrate their sister’s birthday, and the two brothers and others were consuming alcohol in the yard when an argument ensued that quickly led to a scuffle between the two brothers.The fight reportedly stemmed from a disagreement between the suspect and a neighbour. Preliminary investigations revealed that the now injured man intervened in the dispute and started to argue with his brother. The brother became annoyed, picked up a piece of wood and dealt Persaud one blow to the back of his head, reportedly causing Persaud to fall to the ground in an unconscious state.He was rushed to the Diamond Diagnostic Centre, where he was treated and transferred to the GPHC to seek further medical attention. He remains in critical condition at that medical facility.The Police were summoned, and the suspect was taken into custody. The piece of wood which was used to commit the act was not recovered, but Police are continuing their investigations.