Officials with the Colorado Rockies are investigating an incident in which a spectators at a home game at Coors Field in Denver shouted the N-word at Miami Marlins outfielder Lewis Brinson on Sunday (August 8) .

The incident took place in the top of the ninth inning while Brinson, who is Black was at bat. Microphones on the field picked up the slur, according to Sports Illustrated. It could be heard on the Bally Sports broadcast.

The slur was used four times during Brinson’s at-bat, the New York Daily News reported.

The Rockies expressed anger at what happened and vowed to get to the bottom of it

“The Rockies have zero tolerance for any form of racism or discrimination, and any fan using derogatory language of any kind will be ejected and banned from Coors Field,” the team said in a statement on Twitter.

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Marlins broadcaster Paul Severino immediately took to Twitter to share his thoughts.

“I’m absolutely disgusted at the language that was picked up by the mics late in the game today,” the announcer said. “The level of hate that was displayed has no place in this world. Unfortunately it’s still far too prevalent. We need to be better. And soon.”

Sports Illustrated said it was unclear whether security took any action against the fan. The Rockies beat the Marlins 13-8.