A noose was found in the garage stall of Bubba Wallace at Talladega Superspeedway in Lincoln, Alabama, on Sunday, less than two weeks after Wallace, who is NASCAR’s only black driver, successfully pushed the stock car racing series to ban the Confederate flag at its tracks and facilities.

“Late this afternoon, NASCAR was made aware that a noose was found in the garage stall of the 43 team. We are angry and outraged, and cannot state strongly enough how seriously we take this heinous act,” NASCAR said in a statement. “We have launched an immediate investigation, and will do everything we can to identify the person(s) responsible and eliminate them from the sport.

“As we have stated unequivocally, there is no place for racism in NASCAR, and this act only strengthens our resolve to make the sport open and welcoming to all.”

Wallace never saw the noose, ESPN’s Marty Smith reported. It was first seen by a member of Wallace’s team, who immediately brought it to the attention of NASCAR, Smith reported. NASCAR told Fox Sports that it will work with law enforcement on the incident.

Wallace, who drives the No. 43 Chevrolet for racing icon Richard Petty, said in a statement that he was “incredibly saddened” by the act.

“Today’s despicable act of racism and hatred leaves me incredibly saddened and serves as a painful reminder of how much further we have to go as a society and how persistent we must be in the fight against racism,” Wallace wrote on Twitter. “Over the last several weeks, I have been overwhelmed by the support from people across the NASCAR industry, including other drivers and team members in the garage. Together, our sport has made a commitment to driving real change and championing a community that is accepting and welcoming of everyone.

“Nothing is more important and we will not be deterred by the reprehensible actions of those who seek to spread hate. As my mother told me today, “they are just trying to scare you.” This will not break me, I will not give in nor will I back down. I will continue to proudly stand for what I believe in.”

NASCAR has spent years trying to distance itself from the Confederate flag, long a part of its moonshine-running roots from the its founding more than 70 years ago. Five years ago, former chairman Brian France tried to ban flying the flags at tracks, a proposal that was not enforced and largely ignored.

This year was different and it was Wallace who led the charge, calling for the sanctioning body to prohibit the flag.