The Netherlands has begun legal action against Russia after it seized a Greenpeace crew and their ship at gunpoint.
The group were staging a protest against oil drilling in the Arctic.
Two Dutch citizens were among the those on board and the boat, the Arctic Sunrise, is also Dutch-registered.
Amongst those detained is freelance photographer, Denis Sinyakov, who formerly worked for Reuters.
His wife, Alina Sinyakov thanked people for their support: “It’s a big pleasure to realise that we – Denis and I – are supported by so many journalists. And I guess that this is because any of you journalists could find yourselves in the same situation.”
Russia accuses the protesters and Sinyakov,of piracy. The so-called Artic 30 all face up to 15 years in jail.
Greenpeace calls the charges “irrational, absurd and an outrage”.
The arrests come as Russia has opened a permanent military base in the region and is staking its claim to the Arctic and its natural resources.
In 2014, the UN will receive competing claims on territory from all of the Arctic nations.