New York (CNN Business)Facebook on Tuesday said it had shut down more than 150 fake accounts it determined were run from China, including accounts posting about November's US presidential election.

Facebook said the scale of the operation was small, but it is the first time the company has made public details about an operation it found to be run from China that had been posting about the US election.

The accounts "posted content both in support of and against presidential candidates Pete Buttigieg, Joe Biden and Donald Trump," Nathaniel Gleicher, Facebook's head of security policy, wrote in a post on the company's website.