NEW YORK (CBSNewYork) — A 57-year-old woman was stabbed in what law enforcement sources believe was an unprovoked attack in Brooklyn on Sunday evening.

The woman was stabbed in the left arm outside of 400 Washington Avenue in Fort Greene at around 6 p.m., according to law enforcement sources.

Sources say the woman was taken to Brooklyn Hospital for treatment, 1010 WINS reported.

There have been no arrests.