A 32-year-old man has been arrested by police in Bristol in connection with alleged Twitter threats made against women, reports the BBC.
He is suspected of offences against two women, who reported the alleged threats on 25 and 29 July.
The BBC says it understands the arrest relates to threats made against Labour MP Stella Creasy and feminist campaigner Caroline Criado-Perez.
They were among a number of women recently targeted by online anonymous "trolls".
The Bristol arrest is the third made since alleged threats appeared on Twitter two weeks ago. There have also been arrests of two men in Manchester and in the North-East.
The Metropolitan Police said the man arrested in Bristol is being held under the Protection from Harassment Act 1997, and was due to be taken to a Bristol police station.
Two weeks ago politicians, journalists and celebrities were targeted with a mixture of threats, which included rape and bombings.
Criado-Perez was targeted by trolls when she successfully lobbied for a woman's face to be pictured once more on UK banknotes.