Kyrie Irving was the subject of poor fan treatment Sunday night after the Brooklyn Nets’ victory in Game 4 against the Celtics at TD Garden in Boston.

Irving was heading back to the locker room when someone hurled a water bottle at him. He and teammates Tyler Johnson turned back and looked up into the stands. Police surrounded a man in a Celtics’ Kevin Garnett jersey, placed him in handcuffs and led him out of the arena.

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It was the latest incident of fans’ wild behavior at NBA games.

"(It’s) just underlying racism, and treating people like they’re in a human zoo," the Nets star said.

"Throwing stuff at people, saying things. There’s a certain point where it gets to be too much. You see people just feel very entitled out here. ... As a Black man playing in the NBA, dealing with a lot of this stuff, it’s fairly difficult. You never know what’s going to happen," he added.

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Irving scored 39 points and grabbed 11 rebounds in the team’s 141-126 victory to take a 3-1 lead in the playoff series. He caused a stir last week when he hoped there would be no "subtle racism" when the series shifted back to Boston.

A TD Garden official said Boston police arrested one person for "throwing an object."

A fan is handcuffed and escorted out of TD Garden by police after allegedly throwing a water bottle at Brooklyn Nets' Kyrie Irving as Irving left the court after Game 4 of an NBA first-round playoff series, Sunday, May 30, 2021, in Boston. The Nets won 141-126. (AP Photo/Elise Amendola)

"We have zero tolerance for violations of our guest code of conduct," TD Garden spokeswoman Tricia McCorkle said. "And the guest is subject to a lifetime ban from TD Garden."

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The latest incident follows three fan incidents in three NBA playoff games. The fans in question were banned indefinitely.

The Associated Press contributed to this report.