A suspected explosive device was found at a building in Manhattan early on Thursday, local time. It is home to Mr De Niro’s production company and Tribeca Grill restaurant.
New York City Mayor Bill de Blasio praised the “really quick-witted work of a security guard” who alerted authorities.
According to the Associated Press, the security guard was off work on Thursday and had seen an image in a news report of the packages others had received.
That individual then recalled spotting something similar in the building’s mailroom and immediately called authorities who removed the device around 06:30 (10:30 GMT), AP reports.
CNN’s New York office was evacuated on Wednesday morning, after the package addressed to Mr Brennan was found in its mailroom.