Six activists with the environmentalist group Greenpeace have occupied a Russian oil rig to protest drilling in the Arctic. The rig belongs to the Russian state-owned energy giant Gazprom, which is set to become the first company to produce Arctic oil through drilling operations in the Pechora Sea. Greenpeace says its members have enough supplies to last them for days. The group includes Greenpeace’s executive director, South African activist Kumi Naidoo.