Baltimore's Adam Jones reacted angrily on Twitter after a banana landed near him during Sunday's game against San Francisco.

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MLB to investigate incident at Orioles-Giants game Sunday

Orioles centerfield Adam Jones angry after claiming a fan threw a banana at him

Jones took to Twitter to voice his displeasure

The Giants apologize for the incident

CNN  — 

A San Francisco Giants fan who threw a banana that landed near Baltimore Orioles centerfielder Adam Jones during a weekend game said the incident was not racially motivated, but an act of frustration at his team’s poor performance.

Alexander Poulides told the San Jose Mercury News that he’s embarrassed and shocked, but most of all apologetic for his “indiscretion.”

Poulides said he was unaware of the uproar until Monday morning when he turned on the news. His heart sank when heard the outcry over an unidentified Giants fan who threw a banana at Jones, who is African-American.

“Oh, my God,” Poulides said. “I threw a banana on my way out.”

That’s when he contacted the newspaper to claim responsibility.

“I’m embarrassed and shocked by the outcome,” he said. “In hindsight, I wish I didn’t do it and I apologize. I’m very sorry.”

Poulides grabbed the banana from a catering cart, tossing it on the field, he said. The fruit became a projectile of disgust during the ninth inning of a blowout loss on Sunday to the Orioles at AT&T Park.

The team’s front office said it’s continuing to investigate.

“The Giants have a zero tolerance policy against this type of behavior, which results in immediate ejection from the ballpark,” a statement from the team said. “While we have been investigating the matter since we learned of the situation, unfortunately we have been unable to identify the person responsible.

“We would like to extend our sincerest apologies to Adam and the entire Orioles organization for this unfortunate incident.

“The inappropriate actions of this individual in no way reflect the values of our organization and our fans.”

Jones, who is an African-American, voiced his displeasure on his official account.

“I want to thank whatever slap—- threw that banana towards my direction in the last inning,” he posted. “Way to show (your) class (you) jack—”

MLB Senior Vice President of Public Relations Patrick Courtney told CNN Sports Monday: “We are looking into this situation.”

The Orioles enjoyed a 10-2 victory over last season’s World Series winners, rallying from an early two-run deficit to score 10 unanswered runs.

Jones hit a three-run homer at the top of the ninth inning to help clinch the victory.

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CNN Sports contributed to this report