Finneas O'Connell said he had been tear-gassed at the Los Angeles protests against immigration enforcement in the Californian city, which later descended into rioting.
"Tear gassed almost immediately at the very peaceful protest downtown - they're inciting this," O'Connell, whose sister and musical partner is Billie Eilish , posted to his Instagram page.
He also wrote: "F**k ICE ".
This is a developing article. Updates to follow.