A 25-year-old man has been arrested after a string of abusive and threatening tweets were sent to MP Stella Creasy and campaigner Caroline Criado Perez.

Police in the North East arrested the South Shields man yesterday.

A Scotland Yard spokesman said: "Today Northumbria Police arrested a 25-year-old man on suspicion of harassment.

"This arrest will form part of two ongoing MPS investigations relating to allegations made to police by two separate victims, who made reports of malicious communication to police on 25 and 29 July."

Miss Creasy supported a successful campaign led by Ms Criado Perez to include an image of  Jane Austen on ten pound notes.

Both were subjected to threats of rape made under a number of different user names.

It has prompted calls for Twitter to do more to tackle online abuse.