South Korea’s spy agency says North Korean leader Kim Jong-un is “extremely obese”, weighs more than 310 pounds and is at high risk of cardiovascular disease. A lawmaker relaying the assessment said Kim remains physically active and his medical team has not identified signs of current health problems. His wellbeing is closely monitored because a sudden death could raise questions about succession and stability in the nuclear-armed country.

Kim is a heavy smoker, and his father and grandfather were also obese smokers who died of heart attacks. The report comes amid chronic food shortages in North Korea, while accounts from chefs who worked with Kim’s cooks describe his preference for luxury foods such as caviar, lobster and foie gras. South Korea’s intelligence agency has also assessed that Kim’s daughter, believed to be about 13, may be moving towards a succession role; it is investigating whether he has a son.