President Donald Trump’s youthful brother, Robert Trump passed away on Saturday night after being hospitalized in New York, the President said in a statement. He was 71. The President visited his brother at a New York City hospital on Friday after White House authorities said he had become to be genuinely sick. Authorities did not instantly release the cause of death.

“It is with a heavy heart I share that my wonderful brother, Robert, peacefully passed away tonight,” Mr. Trump said in a statement. “He was not just my brother, he was my best friend. He will be greatly missed, but we will meet again. His memory will live on in my heart forever. Robert, I love you. Rest in peace.”

The president is anticipated to attend Robert Trump’s funeral. The youngest of Trump’s siblings had remained close to the 74-year-old President and, as of late as June, recorded a claim for the sake of the Trump family that unsuccessfully stopped distribution of a tell-all book by the president’s niece, Mary. Robert Trump had been reported hospitalized in the intensive care unit for a few days that same month.

Former Vice President Joe Biden, the presumptive Democratic nominee, expressed condolences to the president and his family on Sunday morning. “Mr. President, Jill, and I are sad to learn of your younger brother Robert’s passing. I know the tremendous pain of losing a loved one — and I know how important family is in moments like these,” Biden tweeted hope you know that our prayers are with you all.”

Both longtime businessmen, Robert and Mr. Trump had strikingly distinctive personalities. Mr. Trump once described his younger brother as “much quieter and easygoing than I am,” and “the only guy in my life whom I ever call ‘honey.'”

Robert Trump started his career on Wall Street working in corporate finance but afterward joined the family business overseeing real estate holdings as a best official within the Trump Organization. “When he worked in the Trump Organization, he was known as the nice Trump,” Gwenda Blair, a Trump family biographer, told The Associated Press. “Robert was the one people would try to get to intervene if there was a problem.”

The eldest Trump sibling and Mary’s father, Fred Trump Jr. battled with alcoholism and died in 1981 at the age of 43. The President’s surviving siblings include Elizabeth Trump Grau and Maryanne Trump Barry, a retired federal appeals judge.