Homeland Security Secretary Kristi Noem has debuted a multimillion-dollar ad campaign that implores illegal immigrants in the United States to self-deport and warns would-be migrants from around the world not to enter the country unlawfully.

“Tonight, I’m announcing a nationwide and international multimillion-dollar ad campaign warning illegal aliens to leave our country NOW or face deportation with the inability to return to the US,” Noem wrote in an X post late Monday evening. “This serves as a strong warning to criminal illegal aliens to not come to America. If they do, they will be hunted down and deported. Thank you @realdonaldtrump for securing our border and putting America first.”