SEOUL, South Korea (NewsNation Now) — North Korean leader Kim Jong Un on Saturday sent a message of sympathy to President Donald Trump and his wife Melania, wishing they would recover from the COVID-19 illness, state media reported.

“He sincerely hoped that they would recover as soon as possible. He hoped they will surely overcome it,” the Korean Central News Agency reported. “He sent warm greetings to them.”

Trump said Friday he and his wife had tested positive for the coronavirus, and leaders across the world have sent messages of goodwill to the couple.

Kim and Trump once exchanged threats of destruction and crude insults after North Korea in 2017 carried out a series of high-profile weapons tests aimed at acquiring the ability to launch nuclear strikes on the U.S. mainland. Trump had said he would rain “fire and fury” on North Korea and derided Kim as “little rocket man” on a suicide mission, while Kim responded he would “tame the mentally deranged U.S. dotard with fire.”

But they stopped such rhetoric and instead developed a personal relationship after Kim abruptly reached out to Trump in 2018 for talks on the fate of his advancing nuclear arsenal.

They met three times in 2018-2019, starting with a summit in Singapore that made Trump the first sitting U.S. president to meet a North Korea leader since the end of the 1950-53 Korean War. But their meetings made little headway since their second summit in Vietnam in early 2019 ended without any deal following disputes over U.S.-led sanctions on North Korea.

Despite the deadlocked talks, Kim hasn’t lifted his self-imposed moratorium on nuclear and long-range missile tests in an apparent effort to keep chances for diplomacy alive. North Korea’s economy is believed to have worsened due to the sanctions and the pandemic that forced it to close its border with China, its biggest trading partner, in January.

North Korea has said there hasn’t been a single virus outbreak on its soil, a claim widely disputed by foreign experts.