CBS News previously debunked the story, but Microsoft's report was the first indication that Russia was the source of the false news. The story was initially spread by a website disguised as a local San Francisco media outlet and was replete with an embedded video that Microsoft said used a paid actor.

A report released this week by Microsoft detailed several election interference efforts linked to Russia targeting the Harris presidential campaign.

Microsoft said the Russian campaign aims to "sow discord and spread misinformation" ahead of the November presidential election.

A Russian troll farm was behind false claims Kamala Harris was involved in a 2011 hit-and-run accident and other inflammatory stories that spread online, according to a report from the Microsoft Threat Analysis Center.

Russian actors are trying to discredit the vice president and her running mate, Tim Walz, in the lead-up to the November election, researchers found.

SAN FRANCISCO - Russian propagandists are escalating attacks on the presidential campaign of Vice President Kamala Harris with false but widely circulated videos on social media, including one that featured an actor accusing Harris of a nonexistent hit-and-run that paralyzed a girl,

Disinformation videos designed to influence American voters and undermine their confidence in Vice President Kamala Harris have emerged in recent weeks. According to Microsoft, these videos were produced by tech groups linked to Russia.