The warrant for the seizure was presented while the vessel was in the Shetlands to refuel. In the warrant, authorities claim there are "reasonable grounds to suspect an offence has been committed under the law of Denmark."
The seizure follows a legal challenge against the recently-enacted Faroe Islands Pilot Whaling Act. Faroese legal consultant, former police officer and adviser in issues regarding safety, security, defence and emergency preparedness - Henrik Weihe Joensen - has filed charges against the Faroe Islands Ministry of Fisheries and Maritime Affairs, challenging the law's legality. He claims the law is 'invalid' because the Faroese Parliament does not have the legislative authority to implement new laws in relation to police activity "which concerns action
Joensen believes that, if the Pilot Whaling Act is declared invalid, it may have a great impact on the cases already brought against Sea Shepherd, and may also have implications for the political relationship between the Faroe Islands and Denmark...watch this space.
UPDATE: 04 October 2015 - end of a tough campaigning season in the Faroes.