Wikipedia administrators have imposed a ban on page edits from computers at the US House of Representatives, following “persistent disruptive editing”.
The 10-day block comes after anonymous changes were made to entries on politicians and businesses, as well as events like the Kennedy assassination.
The biography of former US defence secretary Donald Rumsfeld was edited to say that he was an “alien lizard”.
One of the acts highlighted was an alteration to the page on the assassination of John F Kennedy, which was changed to say that Lee Harvey Oswald was acting “on behalf of the regime of Fidel Castro”.
An entry on the moon landing conspiracy theories was changed to say they were “promoted by the Cuban government”.