England striker Wayne Rooney has said sorry for remarks about England fans after Friday's 0-0 draw with Algeria.
Some fans booed the team off the pitch after the final whistle, prompting Rooney to say into a television camera "nice to see your home fans booing."
"I said things in the heat of the moment out of frustration of our performance and the result," he said in a Football Association statement.
"For my part I apologise for any offence caused by my actions."
Friday's goalless draw, coming after a 1-1 draw with the USA in the opening Group C game, leaves England needing a positive result from Wednesday's final game against group leaders Slovenia to progress to the knock-out stages.
Even England coach Fabio Capello has admitted to being baffled by his players' failure to perform so far at the World Cup.
"This is not the England that I know," admitted the Italian after the Algeria game.
"It is a problem because these players have trained very well. But in the two games it is not the same team that I know.
"It is the same thing I saw in that first game at Wembley when I became England manager.
"I hope in the next game we forget these two performances. On Wednesday I hope to see the England team."
Manchester United striker Rooney has been one of those failing to live up to expectation so far, with Capello admitting he did not know where his form had gone, saying "Wayne Rooney did not play like the Wayne Rooney we know."
The 24-year-old has not scored in either of the games so far, and also failed to hit the target in four appearances at the 2006 World Cup.
Some fans booed the team off the pitch after the final whistle, prompting Rooney to say into a television camera "nice to see your home fans booing."
"I said things in the heat of the moment out of frustration of our performance and the result," he said in a Football Association statement.
"For my part I apologise for any offence caused by my actions."
Friday's goalless draw, coming after a 1-1 draw with the USA in the opening Group C game, leaves England needing a positive result from Wednesday's final game against group leaders Slovenia to progress to the knock-out stages.
Even England coach Fabio Capello has admitted to being baffled by his players' failure to perform so far at the World Cup.
"This is not the England that I know," admitted the Italian after the Algeria game.
"It is a problem because these players have trained very well. But in the two games it is not the same team that I know.
"It is the same thing I saw in that first game at Wembley when I became England manager.
"I hope in the next game we forget these two performances. On Wednesday I hope to see the England team."
Manchester United striker Rooney has been one of those failing to live up to expectation so far, with Capello admitting he did not know where his form had gone, saying "Wayne Rooney did not play like the Wayne Rooney we know."
The 24-year-old has not scored in either of the games so far, and also failed to hit the target in four appearances at the 2006 World Cup.