CAIRO - Islamic State said on Monday one of its fighters was responsible for a shooting and hostage situation in Australia and that he had done so because of the country's membership in a US-led coalition against the militant group. 'The attack in Melbourne, Australia was carried out by a soldier of the Islamic State in response to the call for targeting the subjects of the coalition states,' the group's Amaq news agency said. Australian police on Monday shot dead a gunman in the city of Melbourne who had taken a woman hostage. The gunman shot three officers following a standoff of over an hour.