The Pac-12 announced it has reprimanded and fined Arizona coach Sean Miller $25,000 for two postgame incidents after the Wildcats' 66-64 loss to UCLA in Las Vegas on Friday.

The conference said in a statement Sunday night that Miller confronted an official on the floor immediately after the game and later "acted inappropriately" toward a staff member in the hallway of the MGM Grand Garden Arena.

Miller had been warned about acting inappropriately toward officials after games, the Pac-12 said.

"The conference has a formal system of evaluation and feedback in place for coaches to express concern about officiating," Pac-12 commissioner Larry Scott said. "Coaches play a significant role in the overall officiating program and are expected to address concerns through the structure provided.

"Threatening, intimidating and unprofessional conduct will not be tolerated. … Even in tense and trying moments following a game, we expect Pac-12 coaches to conduct themselves in a professional manner."

A UA spokesman said Sunday night that Miller would not comment on the fine and reprimand, and UA athletic director Greg Byrne was not available for comment. However, Byrne supported Miller on Twitter.

"We are aware of the reprimand by the Pac-12," Byrne's Twitter page read. "We are now solely focused on the NCAA tournament, and I'm glad Sean Miller is our coach."

During a brief news conference Sunday before the Pac-12's announcement, Miller referenced Friday's events. After the game, Miller had indirectly criticized officials for calling a turnover on Mark Lyons because he believed a UCLA player touched the ball, and then criticized himself for picking up a technical foul when he argued the point during the game.

"You get into situations and circumstances and you learn a lot," Miller said. "This week was a learning experience and what it tells me as the coach at Arizona is that we have each other, that our players and their development and their opportunity is by far the thing that matters the most, especially to me. To never lose sight that it's about one thing: the University of Arizona."