Etihad Airways said Tuesday it was helping Australian Federal Police with an investigation that police began into an "Islamic-inspired" plot to bring down a plane and resulted in stricter security screening at Australian airports. Four men were arrested in raids in several suburbs in Sydney at the weekend and are being held without charge under special terror-related powers. "Etihad is complying fully with the enhanced security measures at airports in Australia and monitoring the situation closely," the airline said. Police have not identified the airline that was allegedly targeted in the plot, nor the specific means that were to be used to bring it down, other than to say it involved an "improvised device". <br/>