A technical blip during Prime Minister's Questions today led to tweeters claiming that the Prime Minister swore at an MP.
Downing Street has denied that David Cameron told the SNP's Angus Robertson "will you f*** off" when the Prime Minister's microphone cut out for a few seconds.
A spokeswoman for Number 10 said Mr Cameron did not use unparliamentary language and had instead said: "'What are you frightened of?"'
Downing Street also said that Hansard - the official record of parliamentary proceedings - would make it clear that Mr Cameron did not swear.
Within moments of the microphone cutting out, Twitter users started asking whether the Prime Minister had swore.
Mr Robertson, who asked a question about the Electoral Commission's report on the Scottish independence referendum, later tweeted:
A clip of the comment was posted on the internet, with the political website order-order.com asking people to vote on whether Mr Cameron had sworn at the SNP MP.
A majority of voters on the website said he did not swear.