Footage of Jason Russell, the co-founder of the group which launched the "Kony 2012" campaign and related ultra-viral video, was filmed in a naked outburst on a public street in San Diego, Calif.

The video obtained by TMZ shows him pounding his fists on the pavement and screaming.

He was being held "so authorities can decide if he poses a danger to himself and others," according to the publication.

Invisible Children CEO Ben Keesey said Friday that Russell was hospitalized Thursday "suffering from exhaustion, dehydration, and malnutrition. He is now receiving medical care and is focused on getting better."

"The past two weeks have taken a severe emotional toll on all of us, Jason especially, and that toll manifested itself in an unfortunate incident [Thursday]," he said.

Tags: KONY 2012