An attack which saw a man armed with an hatchet charge at a group of police officers, "was a terror attack," Police Commissioner Bill Bratton has told NBC News.
Two police officers who were hurt during the incident remain in the hospital.
Three retired firefighters who worked at ground zero in New York have died on the same day from illnesses that are believed to be related to dealing with the 9/11 terror attacks.
Lieutenant Howard Bischoff and firefighters Robert Leaver and Daniel Heglund all died on Monday, NBC News has reported.
New York Fire Department commissioner Daniel Nigro said the men's deaths are "a painful reminder that 13 years later we continue to pay a terrible price for the department's heroic efforts" in September 2001.
One had leukaemia, another had oesophageal cancer and a third had colon cancer.
The Uniformed Fire Officers Association said 99 per cent of first responders reported suffering at least one new respiratory illness after 9/11.
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A man dressed as Spider-Man has been arrested after punching a police officer in New York's Times Square who told him to stop harassing tourists.
NYPD stepped in when Junior Bishop demanded at least five dollars (£2.95) from a woman he posed for a picture with instead of the one dollar (59p) she offered him.
The officer told the costumed 25-year-old he could only accept tips - not require payment and arrested him.
A yelling, cursing Bishop then broke free after failing to produce identification and punched the officer in the face, leaving him with a cut and swollen eye.
Other officers arrived to take Spider-Man away.
Bishop was charged with assaulting an officer, resisting arrest and criminal mischief.
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A woman accused of abandoning her baby at a New York subway station has told police that she is homeless and felt she could no longer take care of the girl.
The 20-year-old mother has told detectives she came to New York from North Carolina last week.
She added the baby's father had died recently.
NYPD spokesman Stephen Davis said the woman claims she thought she was leaving the baby in a "safe space".
The baby girl is about 10 months old and appears to be in good condition.
A 20-year-old woman suspected of abandoning her baby girl at a New York subway is being held in custody, police have said.
She is being questioned but no charges have so far been filed and the investigation is continuing, the Associated Press reported.
The New York City Police Department (NYPD) tweeted this update.
UPDATE: The previously unidentified child has now been identified & a 20y/o female has been apprehended. Thank you for the help. #20Pct
A baby girl has been abandoned in New York by a woman who pushed the child's pram off a train onto the city's subway platform yesterday afternoon but then stayed on the service.
A passenger on the platform stayed with the child for around 20 minutes, thinking that the woman would return, before alerting the authorities.
Police have released an image of the girl, who is believed to be about six or seven months old, in the hope someone can identify her, NBC New York reported.
The baby was taken to a local hospital and is said to be in a good condition.