The United States has caught no sight of North Korean leader Kim Jong Un and is watching reports about his health, U.S. Secretary of State Mike Pompeo said on Wednesday, adding there was a real risk of famine in the country amid the coronavirus outbreak.

North Korean media has not reported on Kim's whereabouts since he presided over a meeting on April 11, provoking speculation about his health and raising concerns about instability in the nuclear-armed country that could affect other North Asian countries and the United States.

"We haven't seen him. We don't have any information to report today, we're watching it closely," Pompeo told Fox News after being asked about conflicting reports about Kim's health.