Just before 5 p.m., the NYPD said a backpack was found in a public space area in the Fifth Avenue building.
Officers cleared parts of the building while investigators went into see what was in the bag.
Video on social media shows people running to get out of the building:
A short time later, the NYPD determined the package was safe. The bag was filled with children's toys. An "all clear" has been given by officers at the scene.