A brief statement on the team's Web site didn't give a further explanation for the suspension. It said Harrison, 25, was also fined and will miss the Pacers' game Saturday at Cleveland.
The suspension came a day after Harrison was assessed a technical foul and left Indiana's 108-97 loss to San Antonio in the final minute of play.
Harrison, who is averaging 4 points a game, was suspended for five games in January for violating the NBA's anti-drug program.
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