Donald Trump - who has made numerous allegations of voter fraud without providing evidence - has tweeted a video that media reports have already confirmed as showing officials collecting ballots according to their normal procedure.

Mr Trump tweeted the video, saying: "You are looking at BALLOTS! Is this what our Country has come to?"

The video began circulating on 4 November, the day after voting. It shows officials collecting ballots from a drop box. Some social media users claimed it showed evidence of fraud.

However on 6 November Reuters quoted a spokesman for the LA County Registrar-Recorder/County Clerk (RR/CC) as saying that the ballots in the videos “are valid ballots and will be processed and counted in our Official Election Canvass.”

They were being picked up by RR/CC staff, the spokesman said. “All vote by mail ballot drop boxes were closed and locked at 8 PM on Election Day. Ballots from all boxes throughout the County were picked up the following day,” he added.

The California Secretary of State's website says that mail ballots have to be delivered to a ballot drop-off location by the close of polls at 20:00 local time on the day of the election.