Beijing warns Australia to "act prudently" or face "serious consequences", after Canberra accused a Chinese fighter jet of dangerously intercepting one of its spyplanes over the South China Sea. "China once again urges Australia to earnestly respect China's national security interests... and speak prudently to avoid a miscalculation occurring that results in serious consequences," foreign ministry spokesman Zhao Lijian told reporters at a routine briefing. IMAGES AND SOUNDBITES