Security was tight in Sydney with helicopters in the skies overhead and police patrolling in boats and on foot at the harbor.


Even so, members of an Australian TV comedy show, one dressed as Osama Bin Laden, managed to drive through two security checkpoints on Thursday before being stopped near the Sydney hotel where President George W. Bush is staying.


The stunt embarrassed Sydney police who have imposed the tightest security measures in city history for a summit of leaders from pacific rim countries, including bush.


Police arrested 11 cast and crew from the TV program, "The Chaser's War on Everything," and impounded three vehicles.


Cast members put together a sham motorcade, hiring two motorcycles and three large cars on which they put Canadian flags.


Police waved the motorcade through two checkpoints before pulling it over near the intercontinental hotel where bush is staying.


Cast member Chas Licciardello got out of the car dressed in a white tunic and cap and wearing a long fake Osama Bin Laden-style beard.


Bush is a frequent target of "the chaser," as are Australian politicians. Foreign Minister Alexander Downer said the stunt was harmless.