White House border czar Tom Homan confirmed on Sunday that the Department of Homeland Security is investigating allegations involving Rep. Ilhan Omar, D-Minn., but declined to provide specific details about what he described as an "ongoing criminal investigation."

"I know things are going on, but I can't give specifics of what's happening," Homan said during an appearance on "The Sunday Briefing." He added, "If someone committed an immigration violation, if someone committed marriage fraud or anything like that, regardless if they're a congressman or not, no one's above the law. So I'll leave it at that. We'll let HSI, Homeland Security Investigations, continue the investigation."

When asked directly if he was confirming an investigation into Omar, Homan replied, "I'm confirming that ICE is, yeah — look, I said months ago that there's something that's been reported and needs to be looked at."

Homan's comments follow remarks made by Department of Homeland Security Secretary Markwayne Mullin on a podcast, where he stated, "Something's going to happen... We know that she married her brother to try to bring him to the United States. We know he now lives in London." Mullin also stated, "There may be more to this, the whole family migration and possibly some illegal activity for them to come to the United States to begin with... If we can prove it, that you shouldn't have been here in the first place, we will deport you."

Rep. Omar has faced allegations that she married a man, whom critics allege is her brother, as part of an immigration scheme. Omar has repeatedly denied these allegations, dismissing them as "bigoted lies" on social media in December.

In May, Vice President JD Vance stated that the Justice Department was reviewing whether Omar committed immigration fraud. Vance had previously said in March that he had spoken with White House immigration advisor Stephen Miller about potential legal action against Omar, asserting at the time, "We think Ilhan Omar definitely committed immigration fraud against the United States of America."

Homan explained that a denaturalization process exists for cases of proven immigration fraud, characterizing it as "very serious." "If someone lies through that process to becoming a citizen, and we can prove they, in fact, lied or misrepresented themselves, we can absolutely denaturalize them. We've done it before many times over the last 40 years I've been around, so it's a process," he said.