Excerpt:
The NYPD Hate Crimes Task Force is investigating after the words "Allah Wakbar" were found written on a granite seat at the Sept. 11 memorial on Tuesday, law enforcement sources tell NBC 4 New York.
A private custodian cleaning the area found the graffiti, written in pink and black marker, on a seat in the plaza area between the north and south pools around 10:30 p.m. Tuesday.
Investigators believe someone wrote the words that day. No incidents were reported on Tuesday, and the area is not in the view of any security cameras.