North Korea could complete preparations to fire a missile within the next two weeks at the earliest, Seoul's defense chief reportedly said Wednesday, as South Korea and the US warned Pyongyang of sanctions and other consequences. Defense Minister Lee Sang-hee made the prediction during a closed-door report to ruling Grand National Party leaders, Yonhap news agency said, citing unnamed participants. The ministry said it cannot confirm the report. GNP spokeswoman Cho Yoon-sun was not available for comment. North Korea is believed to be gearing up to test-fire its longest-range missile, the Taepodong-2, moving the rocket and other equipment to a launch site on the country's northeast coast. South Korean media have said a firing could come this month.