Jeffrey D. Allred, Deseret News
Jazz fans enter the arena during NBA playoffs in Salt Lake City on Saturday, April 20, 2019.

SALT LAKE CITY — Security personnel are on high alert at Vivint Arena as the NBA playoffs have moved to the home of the Utah Jazz.

About an hour before the Jazz and Houston Rockets were set to square off in Game 3 of their first round series Saturday night, a fan was issued a warning by security after he heckled Rockets star James Harden as Harden was warming up.

As Harden was putting up shots, the fan, who was standing about 10 rows from the court, loudly yelled things such as "flopper" and "Go Harden" while raising his arms, as if he was sarcastically cheering the All-Star on.

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The fan was then approached by security, and a source told the Deseret News' Eric Woodyard that he was given a warning for his behavior.

The fan returned to his seat a short time later.

The incident comes in the wake of the March 11 incident involving a Jazz fan and Oklahoma City Thunder guard Russell Westbrook, which resulted in that fan, as well as another from a previous incident, receiving lifetime bans from Vivint Arena.

Since then, the arena's Fan Code of Conduct has been emphasized at games, a code that includes no obscene language or gestures, fighting, throwing objects or attempting to enter the court or interrupt play.