Arnold's attorney Marty Singer confirmed to The Hollywood Reporter that Arnold was "attacked" by Burnett, but didn't say what their next steps will be.
Metro.co.uk has contacted representatives of both Tom Arnold and Mark Burnett for comment.
Security quickly stepped in to defuse the scuffle, and both men were granted entry into the party after settling down.
He has been vocal in goading "The Apprentice" creator Burnett, claiming the latter has an embarrassing tape of Trump from the series.
"I am going to keep hammering Mark Burnett until he shows America [the tapes]", Arnold said in July.
Arnold replied to Downey's tweet, calling her account of the incident false.
Dems call for delay of Kavanaugh vote after accuser comes forward
Bob Corker of Tennessee, said the vote should be postponed until the committee heard from Ford. She also said that "Judge Kavanaugh should also testify as to these 36-year-old allegations".
Burnett's wife Roma Downey also tweeted about the Evening Before altercation, saying Arnold "tried to ambush my husband" at the glitzy charity event. According to a source with knowledge of the situation, Burnett and Arnold arrived at the event held at the Lawn at Century Park at around 9:30 p.m. Things have been tense between Arnold and Burnett ever since Arnold's allegation that there are tapes from Donald Trump's show The Apprentice, of which Burnett was an executive producer, that prove Trump is a bigot. Last night, the two attended the same pre-Emmys party, and they appear to have gotten into a physical altercation over some Trump tapes.
One attendee told Variety that Arnold could be heard asking Burnett about outtakes from "The Apprentice". He wrote, "I'm with @TomArnold, everyone". #TheHuntForTheTrumpTapes Starts Tuesday 10:30p @VICELAND & we do a Mark Burnett/Apprentice episode the first night.
He claims he has witnesses to back him up as well as a video shot on director Bryan Fogel's phone.
"Mark Burnett, Tom Arnold is there anyway that we could get together and talk?" Arnold was a contestant on the show.