China has dispatched a team to North Korea including medical experts to advise on North Korean leader Kim Jong Un, according to three people familiar with the situation.

The trip by the Chinese doctors and officials comes amid conflicting reports about the health of the North Korean leader. It was confusing to immediately determine what the trip by the Chinese team signaled in terms of Kim’s health.

A delegation led by a senior member of the Chinese Communist Party’s International Liaison Department left Beijing for North Korea on Thursday, two of the people said. The department is the main Chinese body dealing with neighbouring North Korea.

The sources declined to be identified given the sensitivity of the matter. Daily NK, a Seoul-based website, reported earlier this week that Kim was recovering after undergoing a cardiovascular procedure on April 12. It cited one unnamed source in North Korea.

South Korean government officials and a Chinese official with the Liaison Department challenged subsequent reports suggesting that Kim was in grave danger after surgery. South Korean officials said they had detected no signs of unusual activity in North Korea.

On Friday, a South Korean source told their intelligence was that Kim was alive and would likely make an appearance soon.

North Korea is one of the world’s most isolated and secretive countries, and the health of its leaders is treated as a matter of state security.

North Korea’s state media last reported on Kim’s whereabouts when he presided over a meeting on April 11. State media did not report that he was in attendance at an event to mark the birthday of his grandfather, Kim Il Sung, on April 15, an important anniversary in North Korea.