A court in Hong Kong adjourned a national security trial hearing of media mogul Jimmy Lai on Friday due to concerns about his health after his defense said he had been experiencing heart palpitations.

U.S. President Donald Trump on Thursday said he would see what he could do to help "save" detained Hong Kong media tycoon Jimmy Lai, even though Chinese President Xi Jinping would not be "thrilled."

Jailed Hong Kong pro-democracy tycoon Jimmy Lai could die in in prison if found guilty, his son told the BBC. Sebastien Lai was speaking to the BBC's Danny Vincent ahead of the final stage of his father's trial for national security offences.