A billboard near Interstate 15 and Spring Mountain Road in Las Vegas was found vandalized early Thursday morning.

A vandalized billboard near Interstate 15 and Spring Mountain Road in Las Vegas is seen Thursday, March 1, 2018. The billboard is an advertisement for Battlefield Vegas, a Las Vegas shooting range. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

The vandalized billboard, left, and after the billboard had been taken down near Interstate 15 and Spring Mountain Road in Las Vegas, Thursday, March 1, 2018. The billboard was an advertisement for Battlefield Vegas, a Las Vegas shooting range. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

A vandalized billboard near Interstate 15 and Spring Mountain Road in Las Vegas is seen Thursday, March 1, 2018. The billboard is an advertisement for Battlefield Vegas, a Las Vegas shooting range. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

Las Vegas police are investigating the vandalism of a billboard near Interstate 15 and Spring Mountain Road in Las Vegas on Thursday, March 1, 2018. The billboard was vandalized with the message "Shoot a School Kid only $29." Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

Las Vegas police are investigating the vandalism of a billboard near Interstate 15 and Spring Mountain Road in Las Vegas on Thursday, March 1, 2018. The billboard was vandalized with the message "Shoot a school kid only $29." Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

A vandalized billboard near Interstate 15 and Spring Mountain Road in Las Vegas is seen Thursday, March 1, 2018. The billboard is an advertisement for Battlefield Vegas, a Las Vegas shooting range. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye

A billboard near Interstate 15 and Spring Mountain Road in Las Vegas was changed overnight by vandals, Thursday, March 1, 2018. The billboard is an advertisement for Battlefield Vegas, a Las Vegas shooting range. (Max Michor/Las Vegas Review-Journal)

A billboard near Interstate 15 and Spring Mountain Road in Las Vegas was vandalized early Thursday morning.

The billboard advertising Battlefield Vegas, a shooting range in Las Vegas, was changed from “Shoot a .50 Caliber Only $29” to read “Shoot a School Kid Only $29.” Over the phone number for Battlefield Vegas was pasted “Defend Lives Reform Laws.”

By 9 a.m., both the original signage and the alterations had been removed.

An activist art collective, INDECLINE, claimed the vandalism and provided a video showing two people making changes to the sign.

“This protest piece is in response to America’s longstanding obsession with gun culture and our government’s inability to honor the victims of mass shootings by distancing themselves from the homicidal policies of the (National Rifle Association),” the group wrote in a news release.

The NRA did not immediately respond to a request for comment. Battlefield Vegas declined comment.

Las Vegas police are investigating the vandalism. Metropolitan Police Department spokesman Jay Rivera said the video the group released would help identify those responsible.

Last August, INDECLINE claimed responsibility for vandalizing a Floyd Mayweather billboard along Interstate 15 before the famed boxer’s bout with Conor McGregor.