A Greenpeace protest ship has been stopped by the Danish navy on the way to a oil rig in the Arctic, the environmentalist group said in London Monday, dpa reported.
Denmark had threatened to storm the ship Esperanza and arrest its capitain if the ship crossed into a security zone.
It was headed to a drill off the island of Disko near Greenland, where British company Cairn Energy was conducting tests for possible oil and gas drilling.
Greenpeace claims drilling there at a depth of 500 metres is too dangerous and point to the BP Plc disaster in the Gulf of Mexico. If a leak were to occur in winter, it would be difficult to reach the well under the ice, the group said.
Cairn Energy said the work is safe and stressed it was there at the invitation of the government.
Greenland is an autonomous Danish territory.