Newcastle said in a prepared statement:
"His behaviour was unacceptable and is not the behaviour we expect from the manager of Newcastle United.
"It is most disappointing that this incident has taken the focus away from what was a fantastic performance by the team and an excellent result away from home which leaves the club in eighth place in the Barclays Premier League.
"Sadly, the headlines tomorrow will not be focused on the result or the efforts of the players, but instead on the actions of our manager.
"We have held discussions this evening with Alan who has offered his sincere apologies to the Club and it is clear he deeply regrets his actions. Alan has accepted a formal warning from the Club in relation to his behaviour today and also a Club fine of £100,000.
"The Club is now drawing a line under this matter and will be making no further comment."
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