The BBC has suspended Top Gear host Jeremy Clarkson "following a fracas" with a producer.
An investigation will now take place into the alleged incident and no-one else has been suspended, the corporation said.
It also said Top Gear would not be broadcast this Sunday.
"The BBC will be making no further comment at this time", it added.
Clarkson was put on what was called his final warning last year.
That followed a racism row after claims he used the n-word while reciting the nursery rhyme Eeny, Meeny, Miny Moe during filming of the BBC2 programme.
He previously faced a storm of protest from mental health charities after he branded people who throw themselves under trains as "selfish".
And he was forced to apologise for telling BBC1's The One Show that striking workers should be shot.
A BBC spokeswoman said in a statement today: "Following a fracas with a BBC producer, Jeremy Clarkson has been suspended pending an investigation.
"No one else has been suspended. Top Gear will not be broadcast this Sunday. The BBC will be making no further comment at this time."
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