A Colorado man has been arrested for allegedly removing and destroying LGBTQ Pride flags at New York City's Stonewall National Monument, which commemorates iconic uprisings in the struggle for LGBTQ+ civil rights.

Patrick Murphy, of Denver, was charged with a hate crime and "criminal mischief" after he allegedly removed and "broke" multiple transgender Pride flags that were displayed on the fence surrounding Christopher Park, New York Police Department Detective Ronald Montas told USA TODAY. Murphy, 25, was arrested Monday, Montas said.

The attack, one of several police are investigating, happened during LGBTQ Pride month, which occurs every year in June to commemorate the Stonewall Inn uprisings for LGBTQ rights, which began on June 28, 1969.

Murphy pleaded not guilty, according to court records.

"It is preposterous to conclude that Patrick was involved in any hate crime," Robert C. Gottlieb, Murphy's attorney, told USA TODAY. "The evidence will clearly show that whatever happened that night involving Patrick was not intended to attacks gays or their symbol, the gay Pride flag."

Murphy's arrest comes after several other attacks on LGBTQ Pride flags this year in New York. In February, a woman was arrested and charged with multiple hate crimes after she allegedly torched an LGBTQ Pride flag hanging from a restaurant. In April, a man was caught defecating on a Pride flag in Manhattan.

This month in California, a woman was shot and killed by a 27-year-old man who ripped down a Pride flag hanging outside her clothing shop.

What is the Stonewall National Monument?

The Stonewall National Monument encompasses Greenwich Village's historic Stonewall Inn gay bar, Christopher Park and the surrounding streets and sidewalks where the 1969 Stonewall uprisings against police occurred, according to the National Park Service.

The monument was designated by President Barack Obama in 2016.

The fence surrounding Christopher Park, a public city park, is adorned with different LGBTQ Pride flags, some of which are placed there by U.S. park rangers. The area also includes a photo exhibit showing images of police raids, which were common at bars where LGBTQ people were suspected of gathering. At Stonewall, patrons and LGBTQ advocates rioted against police for days, demanding they be given the same treatment under the law as non-LGBTQ New York residents.

The monument commemorates "a milestone in the quest for LGBTQ+ civil rights," the park service says on its website.

Attacks against LGBTQ Pride flags on the rise

Authorities across the country have been responding this summer to a growing number of attacks targeting LGBTQ flags.

Sarah Moore, an extremism analyst with the Anti-Defamation League and GLAAD, recently told USA TODAY she has tracked incidents across the country where people damage, burn or steal Pride flags hanging outside private residences, restaurants and other businesses. Earlier this year, there was an online hate campaign using a hashtag that advocated for a destroy-the-Pride-flag challenge, she said.

“There's definitely been an increase in attacks against Pride flags," Moore said.

Just in August, Moore has tracked attacks on Pride flags in Newtown, Connecticut; Capitola, California; Hamtramck, Michigan; Seattle and Houston.

"We need allies more than ever," Moore said.