( CNN ) -- Major League Baseball is to investigate a possible racially motivated incident involving Baltimore Orioles centerfield Adam Jones during their game at San Francisco Giants Sunday . Jones took to Twitter to claim that a fan threw a banana at him during the ninth inning at AT & T Park . 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 . '' San Francisco also promised action , but in a statement released to CNN said they had to date been unable to identify the person responsible . `` The Giants have a zero tolerance policy against this type of behavior , which results in immediate ejection from the ballpark , '' it read . `` 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 . '' 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 . He said the reaction of some on Twitter to his angry posting could mean him closing his account . `` Good chance this means I get off social media soon , '' he later tweeted .
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 . Comment: