A man has been arrested following investigations into an allegedly threatening Twitter post that called for people to "Jo Cox" an MP.
Anna Soubry, the MP for Broxtowe in Nottinghamshire, appeared to be the target of an online message which read: "someone jo cox Anna sourby please."
The MP responded to the message, calling the Twitter user a "sad cowardly troll". She later took to the site to thank people for their support.
The Metropolitan Police said a 25-year-old man was arrested at his home in Bethnal Green on "suspicion of sending malicious communications".
A spokesman said the man was in custody in an east London police station. He has not been charged.
It comes after Jo Cox's murderer, 43-year-old Thomas Mair, was jailed for life for shooting and stabbing the Labour MP for Batley and Spen outside her constituency office in Birstall, West Yorkshire, in June.