Andrew Mitchell's lawyer has confirmed that the MP has taken legal action against the Sun and indicated that "other potential actions" were being considered.
Graham Atkins said: "I can confirm that I recently issued proceedings for libel against the owners of The Sun on behalf of Andrew Mitchell MP.
"There are a number of other potential actions being considered but I do not intend commenting any further at this stage."
More top news
One of the most notorious Mexican drug lords still at large has been captured by soldiers at a seafood restaurant in a picturesque town.
A dossier of online abuse directed at the parents of Madeleine McCann is being examined by police.
World leaders meet in London to tackle the Ebola outbreak in west Africa which has so far claimed at least 3,000 lives.