Tony Wang, the general manager of Twitter UK, has said that the company takes online abuse seriously amid calls for the microblogging site to take stronger action.
We take online abuse seriously and provide advice and guidance to our users here: https://t.co/4SMKjeGTAG
We encourage users to report an account for violation of the Twitter rules by using one of our report form: https://t.co/mTEKNxddYz
Also, we're testing ways to simplify reporting, e.g. within a Tweet by using the "Report Tweet" button in our iPhone app and on mobile web.
It follows a series of abusive tweets to Caroline Criado Perez including threats to rape and kill her, after she successfully campaigned for a woman's picture to be put on a new bank note.
More top news
Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.