Outside the Stonewall National Monument in Manhattan, there is no visible sign of the vandalism that led to Thursday’s discovery of 21 Pride flags that the National Park Service says were broken or torn down.

That is because the flags have been replaced.

Police say several incidents involving the vandalism of Pride flags have occurred this month in the city. 

"Anyone commits an act of hate against a community, that they be apprehended, that they be held accountable," Manhattan Democratic City Councilmember Erik Bottcher said. "A message needs to be sent that this is not acceptable. That if you do this you will be held accountable."

The frustration of having to put up a replacement Pride flag, especially during Pride Month, is something Rich Marzullo of Queens knows first-hand.

"Knowing that it's happened yet again, it is frustrating." Marzullo said. "Especially when we do have video with their faces in it."

Over the past three years, Marzullo told NY1 that several Pride flags have been stolen from outside the home in Fresh Meadows where lives with his husband.

Police say the most recent theft at Marzullo’s home took place Tuesday and was captured on surveillance video.

Marzullo says that until the NYPD arrests suspects in attacks against the LGBTQ community, he fears more people will be empowered to do the same.

"The police have always been notified. We've always filed a report,” Marzullo said. "It has been escalated to Hate Crimes Task Force. Nobody has been caught as of yet."

And while those incidents did not involve any physical violence against a person, the NYPD is currently searching for a suspect in connection with an attack on the Upper East Side this past Monday around 3 a.m, in which a 21-year-old man was punched several times in the head by a attacker who police sources say had made derogatory comments about the victim's sexual orientation.

The NYPD says that through June 11 of this year, there were 29 sexual orientation hate crime complaints, which is down slightly from the 33 complaints over the same time frame the previous year.