Just Stop Oil protesters have thrown orange paint over a garden at the Chelsea Flower Show in London.
The Metropolitan Police said three people were arrested on suspicion of criminal damage.
A photo from the scene, shared on Twitter by the force, shows orange paint splashed across an exhibit.
In a statement, Just Stop Oil confirmed three women had thrown paint over the RBC Brewin Dolphin Garden, designed by Paul Hervey-Brookes, after stepping over a rope barrier at 9am on Thursday.
A spokesperson said: “One of them said: ‘What use is a garden if you can’t eat?’
“Cries of dismay could be heard from the public, though this later changed to applause and cries of ‘Well done’.”
The Met said on Twitter: “Officers responded to an incident at #ChelseaFlowerShow this morning.
“Three people were arrested at the scene on suspicion of criminal damage in connection with a #JSO protest. Enquiries are ongoing.”
It comes after activists from Just Stop Oil – which is campaigning to end all new fossil fuel projects in the UK – interrupted the World Snooker Championship at the Crucible last month by throwing orange paint across a snooker table.
On Wednesday, six protesters were arrested on Marylebone Road, central London, the group said.
The RHS Chelsea Flower Show began on Monday and is running until Saturday.
