'You aren't nobody': White man refusing to wear mask berates Black security guard

A white man was caught on video refusing to wear a mask and insisting that a Black security guard was "nobody."

Video of the incident, which was said to have occurred at a convenience store in Illinois, was shared on Twitter on Sunday.

In the video, the would-be customer can be heard arguing with a security guard about wearing a mask. The guard refuses to allow the man to enter the store without a mask.

"Get out of my way," the customer demands. "I'm going to step by you. It's not your building. It's not your store."

"Don't get in my face," the customer warns as he stands inches from the guard. "Back up! Back up!"

"You aren't nobody to tell me anything," the man continues.

"My name is right there," the guard says, motioning to his name tag.

"You're nobody," the customer says.

It was not immediately clear if the man was allowed into the store.

Watch the video below.