Donald Trump’s youngest brother Robert died in hospital aged 71.
“It is with [a] heavy heart I share that my wonderful brother, Robert, peacefully passed away tonight,” he said in a statement on Saturday.
The president had visited his brother in hospital in New York the day before his death, telling reporters: “He’s having a hard time.”
It is unclear what caused Robert Trump’s death.
A number of US media reports suggested he had been seriously ill.