Police say a man is in custody after he stabbed his twin brother during a domestic dispute early Saturday morning.
Investigators say the assault happened at 3 North Christopher Columbus Boulevard in Old City at approximately 1 a.m. The 38-year-old victim was taken to Jefferson University Hospital, where he is listed as being in critical condition.
No identifying information about either man has been released.
Stay with NBC10 and NBCPhiladelphia.com for more on this developing story.