The alleged attack occurred near the intersection of Central Park West and West 61 Street at around 1 a.m.
The woman said she was attacked near the entrance to Central Park. She was not hurt and described her attacker to detectives.
The suspect, described as a man with long hair, fled the scene.
No arrests were immediately made.
Police called a Level 1 mobilization and converged in front of the Trump International Hotel & Tower.
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