Police: 72-year-old Brooklyn man in critical condition after being attacked while walking

A 72-year-old man is in critical condition after a brutal assault in Brooklyn, according to police.
Authorities say the victim was walking near 5th Avenue and 38th Street when he was attacked by an unknown suspect. The victim was found unconscious on the street and brought to NYU Langone Hospital—Brooklyn.
The suspect is still at large. Anyone with information is asked to call the NYPD.