Police say the man attacked the woman on Saturday around 8:30 p.m. at 66th Street and 5th Avenue. Jessica Cunnington reports for NBC4.

The NYPD is looking for an armed man wanted for sexually assaulting a woman in Central Park at knifepoint.

Police said the woman was walking through the park on Saturday night when the attack happened.

Officers responded to reports of an assault around 9:30 p.m. near the intersection of East 66th Street and Fifth Avenue. The unidentified man reportedly approached the 39-year-old woman and threatened her with a knife, then assaulted her.

Police said the woman was taken to a nearby hospital to be treated.

On Sunday afternoon, people enjoying a gorgeous day in the park were shocked to hear about the attack from the previous night.

"A lot of woman are used to having to worry about those things," tourist Joyce Shahboz said. "I've got two daughters. It's certainly a thing that I've always had to worry about."

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Police have not released additional details about who they are looking for and no arrests were made as of Sunday afternoon.