Four people including a 13-year-old girl were arrested today during a yellow vest pro-Brexit march in central London.
Around 100 people in yellow vests marched through Westminster for the protest towards Trafalgar Square, causing disruption and setting off smoke bombs.
Police said a girl aged 13 had been arrested on suspicion of assaulting police.
Three men were also arrested on suspicion of public order offences, police said.
A Metropolitan Police spokesman said: "Four arrests have been made following protests on Westminster Bridge, SW1 at approximately 11am today.
"Three men were arrested on suspicion of public order offences.
"A 13-year-old girl was also arrested on suspicion of assault on police."
Videos showed people sitting down in the road to stop traffic while other video footage posted online captured smoke bombs being let off.
As well as this confrontations with police were also recorded and shared online.
Earlier in the day Transport for London warned people there would be disruption caused by the protest.
Alongside a picture on Twitter, transport official said: “We have very little details on the demo but expect further traffic holds and delays in the Westminster area.”
There were traffic delays in Westminster and towards the Regent Street and Piccadilly Circus areas.
The group’s yellow vest outfits are similar to those worn by protesters in France during recent demonstrations.
There were also similar gatherings of people wearing yellow vests in Cardiff and Manchester.
