Extinction Rebellion protesters have glued themselves to the Liberal Democrats' electric battle bus in London.
Jo Swinson, the party leader, was not on board when the activists arrived, but did go to speak to them.
The Lib Dems have been using an electric vehicle on the campaign trail.
Police were called and Ms Swinson got her planned visit to a youth centre in south London back on track.
Six people were at the location in South London and one of them, Pete McCall, was glued to the bus.
Mr McCall said: "All the parties are being targeted today."
XR sent a statement which said: "Extinction Rebellion are buzzing around campaign buses this morning and demanding the climate and ecological emergency is top of the agenda this election."
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It added: "The protest, going by the name 'Bee-yond Politics', is being carried out to remind politicians of the irreplaceable biodiversity loss that is a direct result of their poor, irresponsible policy making. Activists wanted to plant the plight of bees and other pollinators fully in the minds of the next Prime Minister, and to remind them that they hold the future of life in their hands.
"Our bee population is being threatened by extreme weather and habitat destruction, bringing with it crop instability and food vulnerability."
Ms Swinson told the protesters it was "lovely to meet them" and was pleased about the campaigning work they were doing.
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