Iran does not pose an immediate nuclear threat and the world must act cautiously to avoid repeating mistakes made with Iraq and North Korea, the head of the U.N. nuclear watchdog agency said on Tuesday. Mohamed ElBaradei, director of the International Atomic Energy Agency, said the world shouldn't "jump the gun" with erroneous information as he said the U.S.-led coalition did in Iraq in 2003, nor should it push the country into retaliation as international sanctions did in North Korea. "Our assessment is that there is no immediate threat," the winner of the 2005 Nobel Peace Prize told a forum organized by the Monterey Institute of International Studies south of San Francisco. "We still have lots of time to investigate."