Special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE is reportedly looking into an interaction between a Russian lawyer and Ivanka TrumpIvana (Ivanka) Marie TrumpJustice Dept sues Ivanka’s former business partner in fraud case Steve Schmidt: Trump revoking Brennan's clearance shows his 'autocratic fetish' Trump, Obamas and Clintons among leaders mourning Aretha Franklin MORE surrounding a controversial Trump Tower meeting during the campaign.

While the first daughter and now-White House adviser did not take part in the June 2016 meeting, she exchanged greetings with the Russian attorney and a lobbyist who attended the meeting as they stepped off an elevator, a person familiar with the exchange told the Los Angeles Times

Mueller's team is looking into any interactions the attorney, Natalia Veselnitskaya, and lobbyist, Rinat Akhmetshin, had with President TrumpDonald John TrumpBrennan fires new shot at Trump: ‘He’s drunk on power’ Trump aides discussed using security clearance revocations to distract from negative stories: report Trump tried to dissuade Melania from 'Be Best' anti-bullying campaign: report MORE's family members and inner circle, the Times reported.

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The June 2016 meeting — when the president's eldest son, Donald Trump Jr.Donald (Don) John TrumpTrump Jr.'s business trip to India cost taxpayers more than ,000: report San Francisco ethics official sues Secret Service over Trump Jr. trip to India Spicer slams Omarosa on WH recordings: 'She will do anything to further her own being' MORE, met with the attorney, who promised damaging information on Hillary ClintonHillary Diane Rodham ClintonMueller recommends Papadopoulos be sentenced to up to 6 months in prison Poll: Dem opponent leads Scott Walker by 5 points Cuomo fires back at Trump: 'America is great because it rejects your hate-filled agenda' MORE — has become a flashpoint in the Russia probe.

Trump Jr., the president's son-in-law and senior adviser Jared KushnerJared Corey KushnerSentencing reform deal heats up, pitting Trump against reliable allies Justice Dept sues Ivanka’s former business partner in fraud case Connect Beltway to America to get federal criminal justice reform done MORE and former Trump campaign chairman Paul ManafortPaul John ManafortMueller recommends Papadopoulos be sentenced to up to 6 months in prison Hillicon Valley: Trump escalates feud with intel critics | Tesla shares fall after troubling Musk interview | House panel considers subpoena for Twitter's Jack Dorsey | Why Turkish citizens are breaking their iPhones Manafort jury adjourns for the weekend with no verdict MORE all attended the meeting with the Russian lawyer and lobbyist.

Trump Jr. has maintained that the meeting was primarily to discuss American adoptions of Russian children. 

In an excerpt from a new book detailing the early months of the Trump presidency, former White House chief strategist Stephen Bannon is quoted as saying that there was "zero" chance that President Trump did not know about the meeting.