NEW YORK (CBSNewYork) — A man is facing assault charges for allegedly stabbing an off-duty police officer in Queens Saturday evening.

As 1010 WINS’ Roger Stern reports, 43-year-old Luis Diaz was hosting a family party for his daughter’s first communion when a stranger tried to crash the event around 9:30 p.m. in a residential area near the corner of 94th Street and 30th Avenue in East Elmhurst.

Police say the officer got into an altercation with the 18-year-old man and was slashed in the arm after the man confronted his wife.

The off-duty officer was taken to New York Presbyterian/Queens Hospital with non-life threatening injuries. He has since returned home.

The suspect has been identified 18-year-old Diego Velasco of Queens. He was taken to a nearby hospital where he remains in police custody.

Diaz has been charged with felonious assault, according to police.

Investigators are working to determine why Diaz trying to gain entry to the party.

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