BBC Newsnight political editor Nick Watt was harassed by protesters on Monday Night.
They marched through Westminster shortly before Prime Minister Boris Johnson announced further easing of lockdown restrictions would be delayed until July 19.
The Prime Minister today tweeted: “Disgraceful to see the hounding of Nick Watt doing his job.
“The media must be able to report the facts without fear or favour – they are the lifeblood of our democracy.”
The Met Police are asking for anyone with information to contact them:
“We are aware of a video circulating online from Monday, 14 June in Whitehall during a protest.
“This sort of behaviour is not acceptable and police are investigating the incident.
“Anyone with information is asked to call 101 or crimestoppers on 0800 555 111.”
Nick became Newsnight’s political editor in 2016 after 19 years at the Guardian newspaper.