Australian Federal Police officers have boarded the anti-whaling ship the Steve Irwin in Hobart, after an official request for a search warrant from Japanese authorities.
The Sea Shepherd boat has just docked at the Princes Wharf, marking the end of its summer clashes with the Japanese whaling fleet.
Greens Senator Bob Brown says the Japanese authorities are using the AFP for political purposes.
"It's just totally outrageous that Tokyo, using Australian police personnel has raided the ship carrying these anti-whaling heroes back into port in Hobart," he said.
The AFP also boarded the Steve Irwin at the end of last year's whaling season.
The past few months have seen numerous clashes in the Southern Ocean, including a major collision between the activist boat Ady Gil and a Japanese whaling ship.
Ady Gil captain Peter Bethune, who was detained by the Japanese for boarding
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