City workers were sent to remove a large bronze bust of NSA whistleblower Edward Snowden after it was placed on a war memorial in a Brooklyn park overnight.

The word "Snowden" was attached to the bottom of the statue at the Prison Ship Martyrs Monument in Fort Green Park. Parks Department crews removed the bust Monday afternoon.

Animal New York reports that three artists installed the 4-foot, 100-pound sculpture before dawn, fusing the figure to the stone monument with an adhesive. The website, which recorded the installation of the bust, says that the adhesive shouldn't damage the original statue.

Video of the installation shows several people in construction gear carting in the bust into the park, then using a scaffold to hoist it to the top of the statue.

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The group of artists told Animal that the bust cost thousands of dollars to make, and that they have made a mold so they can create more Snowden effigies once the one in the park is removed.

The NYPD says its intelligence division is looking into the statue and will be looking for DNA and other clues that may lead to a suspect. It's not clear what charges could be filed in the case.

The Prison Ship Martyrs Monument is a centerpiece of Fort Greene Park and marks the burial sites of more than 11,500 men and women who died aboard British prison ships during the Revolutionary War.