Manchester United manager Jose Mourinho was sent to the stands at half-time in the 0-0 draw with Burnley in the Premier League on Saturday, the BBC reports.
Mourinho emerged for the second half and was escorted to a seat in the stands at Old Trafford as his side dropped to eighth in the table.
The 53-year-old Portuguese then moved to the directors’ box.
Referee Mark Clattenburg had dismissed a Manchester United penalty appeal late in the first half.
“I think the events of recent weeks have got to him,” said MOTD pundit Danny Murphy. “I think that it was a penalty, though.”
Mourinho did not speak to the media after a match which United dominated, with 37 efforts at goal.
Assistant boss Rui Faria told BBC Match of the Day: “I don’t know what happened. It is not important what Jose said. What is important is what the referee writes in his report.”
United, who have won only one of their past seven league games, are eight points behind Manchester City, Arsenal and Liverpool, all of whom won on Saturday.