Police are searching the home of a Norwegian neo-Nazi for weapons and explosives, a source told Reuters.
Kristian Vikernes was arrested in France, where he now lives, after his wife bought four rifles.
"That was at the origin of the investigation ... There were several suspicions that made the services fear he could possibly carry out a violent act," a police official confirmed.
More top news
A giraffe has been born in front of visitors to a zoo in Devon.
Viewers have complained that the act between French ventriloquist Marc Metral and his dog, Miss Wendy, is cruel.
Mother of Bobbi and Christi Shepherd accuses former Thomas Cook CEO Harriet Green of trying to use their memory to gain public sympathy