A woman appeared to be arrested for blowing a plastic trumpet at a protest over tree felling in Sheffield.
Footage shows a police officer addressing a woman holding an orange plastic trumpet, warning her she "would be arrested" if she continues blowing the instrument.
The officer leaves and the woman blows the trumpet again, causing the officer to turn around and detain the woman.
Protests have been widespread after Sheffield council announced that thousands of trees will be felled as part of a road improvement contract with a private company.
But protesters claim the trees being removed are perfectly healthy and the measures are unnecessary.