An off-duty cop was reportedly stabbed in the neck by his cousin yesterday, after asking the relative to stop smoking pot in his Bushwick home.

According to cops, 64-year-old Angel Rosario was arrested and charged with attempted murder yesterday after he allegedly stabbed the unidentified 48-year-old officer in the neck and face. Officials say Rosario and the officer got into a fight at around 3 p.m., after the officer allegedly confronted his cousin about the pot-smoking; Rosario reportedly lived in the basement apartment of the officer's home.

The NYPD says the officer was taken to Kings County Hospital in critical condition and underwent emergency surgery; Police Commissioner Ray Kelly visited him last night.