UNITED NATIONS - United Nations Secretary-General Ban Ki-moon warned on Tuesday that a solely military response to the threat of Islamic State in Syria could fuel the radicalization of more Sunni armed groups and spark more violence. 'Our long-term strategic objective in Syria remains a political solution,' Ban told the UN Security Council of efforts to end Syria's three-and-a-half year civil war. 'A purely military response to the vicious new threat posed by (Islamic State) could ultimately contribute to the radicalization of other Sunni armed groups and spark a cycle of renewed violence,' he said.