Japan: Activists hurt whalers in Antarctica

updated 11:01 p.m. ET March 2, 2008

TOKYO - Anti-whaling activists hurled containers of rotten butter at a Japanese whaling ship in Antarctic waters Monday, lightly injuring several crew members, Japan's government said.

Protesters aboard a boat operated by Sea Shepherd threw the objects — containing butyric acid, produced by rotting butter — at the Nisshin Maru whaling ship, which is conducting Japan's research whaling program.

"We strongly condemn this," Chief Cabinet Secretary Nobutaka Machimura  said. Japanese officials said at least three crew members were injured lightly. It was not clear if they were hit with the bottles.

Japan planned to issue a formal protest to the Netherlands, which licenses the activist boat, the Steve Irwin, said Itsunori Onodera, senior vice minister for foreign affairs.

"This kind of illegal act should not be tolerated," Onodera said at a small whaling conference that Japan was hosting Monday with African and Asian nations in Tokyo.

Sea Shepherd and other anti-whaling protesters have continually harassed the Japanese whaling fleet in an effort to interfere with Tokyo's hunting season, during which it takes hundreds of mink whales in the Antarctic.

Japan has accused the activists of terrorist tactics, but Sea Shepherd called on Japan to stop its hunt, in a statement issued after the confrontation.

The group said it threw more than two dozen bottles of rotten butter — which has a rancid odor — onto the Japanese ship, as well as packets with an unspecified slippery chemical onto the deck to interfere with whale flencing.

"I guess we can call this nonviolent chemical warfare," said Sea Shepherd leader Paul Watson in the statement.

The statement made no mention of injuries on the Japanese ship.

More from msnbc.com Why the Lieberman saga ended with a deal New House Democrats wary on taxes, bailout More Americans raiding nest eggs early Investors pay dearly to tap retirement funds Superbug in 40 percent of grocery's meats World Blog: Plotting Dalai Lama's reincarnation

MORE FROM ENVIRONMENT

Environment Section Front

Will oil tycoon's wife save wild horses? Experts warn of water shortages by 2080 Obama: Warming must be tackled now Photographer tries to capture Earth's artistry   Yellowstone reverts to more snowmobiles Real-life Furbys rediscovered   Video: A green national electricity grid? Water resources at risk in a warming world Got photos of polar bears in the wild? Rockslides a growing threat at Yosemite Environment Section Front   Add Environment headlines to your news reader: