LONDON (AP) _ Crew members of a Liberian-registered incinerator ship pushed two British Greenpeace activists into the North Sea 100 miles off England's eastern coast on Tuesday, the environmental group said.

No serious injuries were reported.

Greenpeace spokesman Martin Leeburn said that the two group members, Phillip Cade and Hugh Stirling, wanted to chain themselves to the funnels of the 3,356-ton Vulcanus II in order to stop the vessel from burning toxic waste from Spain into the North Sea.

After four attempts, the two succeeded in attaching wooden ladders to the ship's side when unidentified crew members pushed the ladders into the sea off the coast of Scarborough.

The two men, both in their 20s, were rescued by colleagues in rubber dinghies nearby.