Sunday at the arena, North Carolina plays Arkansas at 6:10pm and University of SC plays Duke at 8:40pm.
The NCAA does not host championship events in MS due to the prominence of the Confederate flag in the MS state flag.
The NCAA released a statement Sunday after a Confederate flag was spotted near Bon Secours Wellness Arena in Greenville, South Carolina.
But the Secessionist Party is now pushing state lawmakers to place that flag in a museum.
SC went 15 years without hosting an NCAA championship event because of a controversy involving the flying of the Confederate flag on its statehouse grounds.
The association boycotted SC until it removed the flag from its state house grounds two years ago.
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"The NCAA is proud and excited to host championships in the state of SC once again", the NCAA's Dan Gavitt said in an emailed release. "We are committed to assuring that our events are safe and accessible to all".
"No symbols that compromise that commitment will be permitted to be displayed on venue property that the tournament controls", he said.
"I think it's very disheartening". It flew near the arena's main fan entrance, making nearly certain that - if it's not removed before - many attendees at Sunday afternoon's games will see it on their way in. He says, "We wanted to show the NCAA that we're still here".
"It doesn't matter what our belief system is personally. My concern is a public safety perspective", Miller said.
Greenville Police Chief Ken Miller, speaking to WYFF, said that no laws were being broken and that the protesters reached out to see if they needed a permit to protest before hitting the streets. Officers said the group called and asked about a permit and were told they did not need to obtain one.
The Midwest Regional in Kansas City was also sold out.