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.

The trial of Jimmy Lai, Hong Kong media mogul, are postponed for a few days due to issues with the 77-year-old's heart. Closing arguments are set for Monday.

A Hong Kong court postponed media mogul Jimmy Lai's trial on Friday, citing his need for a heart monitor -- the second delay this week in the democracy campaigner's national security case.The Hong Kong government said Wednesday it "strongly disapproved and rejected the slanderous remarks made by external forces" regarding Lai's case.