Arturo Di Modica's "Charging Bull" sculpture on Wall Street was splashed with blue paint or dye overnight, according to the NYPD.

Police got a call about the paint, which was concentrated on the bull's head, around 6:00 a.m. Thursday. Someone also draped a blue sash on the Fearless Girl, a small statue conceived by a global investment firm that went viral earlier this year.

The sash read "Draw The Blue Line," an apparent reference to a "public art protest" group.

According to the group's website, Draw The Blue Line's goal is to encourage UN members to acknowledge US citizens' support for the Paris Accord, an international climate change containment plan, during the UN General Assembly taking place September 12th to 25th. President Donald Trump pledged to pull out of the agreement in June.

"The goal is to communicate to attendees of the United Nations General Assembly that the public supports the Paris Agreement," organizers wrote. "Hopefully, they will hear this message and reassert their country’s commitment to the fight against climate change. This visual conversation will be a tangible demonstration of solidarity against climate change denial."

"Draw The Blue Line is asking New York City and the rest of the world to put horizontal blue lines across buildings (facades and interiors), trees, fences, windows, on social media, everywhere" during the Generally Assembly, the group added.

The bull had been scrubbed clean as of 9:00 a.m., according to the NYPD. No arrests have been made, and an investigation is ongoing.

Eric Phillips, a spokesman for Mayor Bill de Blasio, was not amused. This marks the second act of vandalism City Hall has condemned this week.