Port Huron Police are investigating a stabbing that occurred in the 900 block of Oak Street early Saturday morning. Sergeant Karen Brigsby of the Port Huron Police Department tells WPHM authorities were called to the house shortly before 5:30am. Two Port Huron men were engaged in an altercation when one man is believed to have stabbed the other with a knife. The victim was taken to an area hospital for treatment. The suspect is currently in Port Huron Police custody. Police say the motivations behind the argument are unknown at this time and that the incident is still an open investigation.