Russian police have detained at least eight people in eastern Siberia following a gang assault on ecological protesters in which one person died. Up to 20 assailants - described in some reports as "skinheads" wearing dark clothes - stormed into the activists' camp near a uranium enrichment plant.
Clubs and iron bars were used in the attack at dawn on Saturday. Seven others were injured, two seriously.
Russia has plans to use the plant near Angarsk to reprocess foreign uranium.
The motivation for the attack has not yet been confirmed. Some of those held were quoted as saying they had wanted to avenge an attack on one of their friends.
A 26-year-old activist died of head injuries in hospital after the attack.
A Russian interior ministry spokesman, Valery Gribakin, said the assailants were all local men aged from 18 to 22 who had "no links with any extremist youth groups".
But members of Antifa, the group organising the protest camp, blamed the attack on "neo-Nazis".
The Angarsk plant has been reprocessing uranium for 50 years for civilian use.