(CNN) — Jared Kushner, Donald Trump’s son-in-law, testified before the grand jury investigating the aftermath of the 2020 election and the actions of the then-president and others, a source familiar with the testimony confirmed to CNN.

Former Trump aide Hope Hicks also went before the grand jury, according to two sources familiar, testifying in early June.

Some of the questions being asked in the grand jury were about whether Donald Trump was told he had lost the election, according to one of the sources familiar.

Kushner’s and Hicks’ appearances before the grand jury are notable because both were members of the former president’s inner circle. Any indictment from the sprawling probe into the aftermath of the election, efforts to overturn the result or the January 6, 2021, attack at the US Capitol will likely rely, at least in part, on what individuals – from low-level aides to former Vice President Mike Pence – testified to under oath behind closed doors.

A spokesman for Kushner, who served as a senior adviser to Trump during his presidency, declined to immediately comment. The New York Times first reported on his testimony.

Several key Trump White House officials have also testified befoe the grand jury, including Pence, Trump’s former chief of staff Mark Meadows and former White House counsel Pat Cipollone, among others.

CNN also previously reported that Alyssa Farah Griffin, a former Trump White House communications director who is now a CNN political commentator, met with federal prosecutors, sitting for a formal, voluntary interview as part of the ongoing special counsel probe, according to multiple sources familiar with the matter.

Investigators from special counsel Jack Smith’s team have also met with several election officials from key battleground states who were targeted by Trump and his allies as part of their bid to upend Joe Biden’s legitimate victory in the 2020 presidential election.

As CNN has reported, prosecutors met with Georgia Secretary of State Brad Raffensperger late last month, and Michigan Secretary of State Jocelyn Benson and Arizona GOP official Rusty Bowers revealed to CNN that they have been interviewed by prosecutors in recent months.

Benson told CNN on Wednesday that one of the areas investigators seemed focused on was “the impact of the misinformation on [election workers’] lives and the threats that emerged from that from various sources.”

“Myself and the election officials who have – at request or simply because we have a story to tell – have been speaking to authorities, I think it’s really a reflection of our desire to ensure that the law is followed, and where there’s evidence of wrongdoing, there’s justice that is served,” Benson said.

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