Australian police have arrested 12 Greenpeace activists after an APEC protest at Newcastle, the world's biggest coal export port.
The arrests came as authorities again warned protesters against violence at this week's Asia Pacific Economic Cooperation summit.
Australian authorities are staging the nation's biggest ever security operation for APEC, which is to be attended by 21 leaders including US President George W Bush.
Thousands of protesters plan to rally in Sydney during meetings to demonstrate against the Iraq war and global warming.
