A billboard on a major highway in Louisville, Kentucky, was vandalized on Monday to target the National Rifle Association in the wake of school shootings in Kentucky and Florida.

The sign on Interstate 65 northbound read "Kill the NRA" and was tagged with "Resist 45," a group that opposes President Donald Trump, the Courier-Journal reported.

Photos of the billboard circulated on social media before David Watkins—a spokesman for Outfront Media, which owns the billboard—said that the vandalism had been "immediately removed."

The NRA's official Facebook page shared a picture of the sign on Monday with a note: "To all American gun owners, this is a wakeup call. They're coming after us."

"Resist 45" has appeared on billboards across Louisville over the past year, the Courier-Journal noted. A Facebook page for the group appears to have been deleted.

The latest one targeting the NRA popped up days after a school shooting in Parkland, Florida, left 17 people dead. Many students and gun-control proponents have expressed outrage with the NRA and have called for tighter regulations on firearms.

On Wednesday, students from Marjory Stoneman Douglas High School, where the Florida shooting occurred, along with parents and teachers are set to march on the state Capitol in Tallahassee to call for new gun laws.