Man Assaulted And Slashed With Knife Walking On Roosevelt Island Main Street At 6:45 PM Last Night, Attempted Neck Chain Snatching Says NYPD

I received these reports last evening from Roosevelt Island residents:

Saw a couple parts of the sidewalk closed off on Main Street. Blood and glass all over. Was told a crime was committed. First seen was south of the Subway and second scene was outside the temporary library. PSD didn’t say much except there was a crime. Any word?

And:

They have yellow tape outside the library and there's a red liquid/fluid.

Do you know anything?

In response to my inquiry, a NYPD spokesperson reported today:

On Friday, October 27, 2017 at approximately 1845 hours, police responded to a 911 call of a male assaulted in the vicinity of 505 Main Street within the confines of the 114 Precinct.

Upon arrival, police were informed that a 19-year-old male victim was walking in the vicinity of 505 Main Street when an unidentified individual approached and slashed the victim on his left arm. The unidentified individual attempted to remove a chain from the victim’s neck.

The individual then fled in an unknown direction without any property. The victim was transported to an area hospital via EMS in stable condition. There are no arrests and the investigation is ongoing.

I've asked the Roosevelt Island Public Safety Department for info and will update if more details received.