The NOPD is investigating what they call an aggravated battery by cutting on Friday night in the French Quarter.
It happened just before 7 p.m. in the 900 block of Decatur Street, as Carnival krewes rolled down the parade route 10 blocks away on Canal Street.
Police say the 41-year-old victim and the suspect were involved in a physical altercation. The suspect then stabbed the victim in the chest and fled down Decatur
The victim was taken by EMS to the trauma center at University Medical Center around 7 p.m. Friday.