sentences:  The demonstrations turned into street battles between Blitz sympathisers and the police.From the 1990s Blitz has often obstructed legal meetings of right-wing political parties such as the Progress Party, the minor Fatherland Party and the Democrats.Mayhem bassist Varg Vikernes allegedly planned to blow up the Blitz House and had stockpiled 150 kg of explosives and 3,000 rounds of ammunition at the time of his arrest for the murder of bandmate Euronymous in 1993.