A Korean-American cardiologist arrived in North Korea last month to treat the aunt of North Korean leader Kim Jong-un, a source familiar with affairs inside the communist state said Thursday, prompting speculation about the state of her health.
Kim Kyong-hui, the current leader's aunt and younger sister of late former leader Kim Jong-il, has been known to have a heart disease, but the doctor's alleged visit could be an indication that she has fallen into critical condition.