The Prime Minister has rebuked Tory MP Michael Fabricant after he tweeted about punching a journalist.
Mr Fabricant tweeted about the Independent columnist Yasmin Alibhai-Brown after watching her during a TV debate yesterday, saying: "I could never appear on a discussion prog with @y_alibhai I would either end up with a brain haemorrhage or by punching her in the throat."
Speaking to LBC radio, David Cameron welcomed Mr Fabricant's subsequent apology, but said the original tweet was "not an acceptable thing to say".
"Michael knows that that is my view and I don't want to see this happen again," he added.
More top news
Hundreds of facial hair aficionados from around the globe have taken part in the World Beard and Moustache Championships in Austria.
An airliner carrying 147 passengers had to make an emergency landing after the pilot died during the flight.
Health Secretary Jeremy Hunt has been urged to apologise for suggesting tax credit cuts will make Britons work harder.