Piers Corbyn has been arrested on suspicion of encouraging activists to burn down MPs’ offices.

The Metropolitan Police said the man – who it did not name – was arrested in south London in the early hours of Sunday.

“The arrest relates to a video posted online in which people were encouraged to burn down MPs’ offices,” the force said.

The Met earlier said they were assessing a video that appears to show Piers Corbyn calling for the public to burn down MP’s offices.

The video was shared on social media and shows Corby, brother of former Labour leader Jeremy Corbyn, criticising politicians who voted for Covid restrictions to be reintroduced.

After saying, “those scum who have decided to go ahead with introducing new fascism”, the 73-year-old Mr Corbyn tells a crowd in the video: “You’ve got to get a list of them … and if your MP is one of them, go to their offices and, well, I would recommend burning them down, OK. But I can’t say that on air. I hope we’re not on air.”

A Met Police spokesman said in a statement: “We are aware of a video on social media in which people were encouraged to burn down MP’s offices. It is being assessed and enquiries are ongoing.”