Twitter and Google join Facebook in tightening rules on US election claims

Platforms will target unverified claims of election rigging and premature results declarations

Premature claims of victory will be blocked from Twitter and Google in the run-up to November's US presidential election, as both companies follow Facebook in trying to fight the prospect of a stolen vote.

Under its new rules, Twitter will treat as harmful misinformation any tweet which makes false claims about election rigging, or prematurely claims to announce the election results.