Twitter apology welcomed by MP Stella Creasy
3 August 2013 Last updated at 17:14 BST
The boss of Twitter UK has said sorry to women who have experienced abuse on the social networking site.
Tony Wang said the threats were "simply not acceptable" and pledged to do more to tackle abusive behaviour.
The apology came as Twitter updated its rules and confirmed it would introduce an in-tweet "report abuse" button on all platforms, including desktops.
Stella Creasy MP, who reported rape threats on the site, welcomed the moved as an important first step.