North Korean leader Kim Jong Un lost up to 20 kg (44 pounds) but has no major health issues affecting his rule, according to a South Korean lawmaker briefed by a spy agency.

The National Intelligence Service estimated that Kim recently lost between 10 and 20 kilograms, Kim Byung-kee, a lawmaker briefed by the spy agency, told reporters Thursday.

"If there is an abnormality in his health, there should be signs that drugs are being imported to the clinic that’s in charge of Kim’s health, but that was not detected,” the lawmaker said, adding that Kim Jong Un still hosts "hourslong meetings” and there’s nothing unusual about how he walks.