The semi-official ISNA news agency reported Tuesday that Ali Asghar Soltanieh, Iran's ambassador to the International Atomic Energy Agency, said Israel must be forced to join the Nuclear Non-Proliferation Treaty in order to maintain a nuke-free Middle East.“Since Israel is a not a member to any international [nuclear] treaties, serious action should be taken to achieve a WMD-free Middle East. Israel must join the NPT,” he said in Tehran at the closing of the second International Conference on Disarmament and Non-Proliferation.