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One person killed was the gunman, police said, while the other was only described as a 'bystander.'
10 people were injured, WABC reported, in a shooting that apparently started as a workplace dispute.
A witness says the gunman was firing indiscriminately.
FBI is on scene and says no terrorism is suspected.
The shooting happened Friday morning at 34th Street and Fifth Avenue.
A fire department spokesman says it received a call about the shooting just after at 9 a.m. Friday and that emergency units were on the scene within minutes.
The department says paramedics are evaluating eight people but some of them may not have been shot.
