Washington DC - Members of Congresswoman Ilhan Omar's family have been served subpoenas as President Donald Trump's administration continue their investigation into alleged fraud.

According to The New York Times, Omar's sister Sahra Noor and at least one other unnamed family member recently received grand jury subpoenas.

The subpoenas are believed to be part of an inquiry focused on whether the politician's father, Nur Omar Mohamed, who passed away in 2020, lied or omitted information on immigration forms.

Homeland Security agents raided Omar's Washington home on Monday, removing a number of boxes filled with documents.

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NBC News also reported on Tuesday that Omar's phone was seized during the raid, and subpoenas have been served to more than a dozen others.

The subpoenas do not mean those served are under investigation, but instead that the government is seeking their help in retrieving evidence to build its case.

The investigation of an elected official is largely unprecedented, and comes with only a few weeks before midterm elections.

But in his second term, Trump has made targeting political enemies a focus of his administration.

For years, Trump and his MAGA allies have regularly attacked Omar – who fled Somalia with her family and came to the US in 1995 – for being an outspoken critic of the president.

In an interview with Fox News, when Vice President JD Vance was asked about the unprecedented nature of the investigation, he argued that Omar "is a very unprecedented person" and claimed she has "such disdain and such rage at the country that gave her a better life."

"But we're going to see whether she did commit a crime. And if she did, we're obviously going to follow the law," Vance insisted.