Egypt's army-installed government said on Wednesday diplomatic efforts to resolve the political crisis had failed and signaled it was gearing to take action against supporters of deposed President Mohamed Mursi gathered at two protest camps in Cairo. Envoys from the United States, European Union, Qatar and the United Arab Emirates had been trying to defuse the crisis and prevent further bloodshed. But President Adli Mansour's office said the period of international efforts, which began more than 10 days ago, had "ended today".