Seven people have been released on police bail following arrests made in relation to a vehicle stop on Thursday.
Officers carried out a vehicle stop on a car and a van, near Loggans Road, Hayle, at around 5pm on Thursday.
A search was carried out on the vehicles which were found to contain items including paint, smoke grenades and loud hailers.
A 30-year-old man from London, a 21-year-old woman from Wales, and a 20-year-old man from Bournemouth were arrested on suspicion of possession of an article with intent to commit criminal damage.
Two men from London, aged 25 and 27, a 45-year-old woman from London and a 26-year-old woman from Epsom were arrested on suspicion of conspiracy to commit public nuisance.
All seven people have since been released on police bail until 8 July 2021. Enquiries continue in relation to the matter.
A police spokesperson said: “Devon and Cornwall Police will continue to facilitate a lawful and safe protest, but criminal activity and public disorder will not be tolerated.”