The Guardian reports:
Suspected Russian spies floated a series of fake stories on social media including a claim that Remainers were planning to kill Boris Johnson and that the novichok used in the Salisbury attack came from the Real IRA, a new study shows.
The operation was done to provoke tensions between western countries. It was persistent, sophisticated and well-resourced, and involved fake accounts on more than 30 platforms and nine languages.
The most sensational piece of Russian fake news said that “radical opponents of Brexit” were planning to assassinate Johnson. A forged letter warning of the plot was posted on a mocked-up Facebook page that appeared to belong to a senior Spanish official.