Microsoft says fake Kamala Harris hit-and-run story is the work of Russian propaganda group

A false claim circulating on social media that Democratic presidential candidate Kamala Harris left a 13-year-old girl paralysed after an alleged hit-and-run in San Francisco in 2011 is the work of a covert Russian disinformation operation, according to new research by Microsoft.

Researchers found that the operation created a video, paid an actor to appear as the alleged victim, and spread the claim through a fake website for a non-existent San Francisco news outlet named "KBSF-TV". The Russian group responsible, which Microsoft dubs Storm-1516, is described as a Kremlin-aligned troll farm.

The discovery is a sign of Russia ramping up its foreign influence efforts ahead of the Nov. 5 presidential election, Microsoft said.