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.

A Hong Kong court heard final arguments Monday in the landmark national security trial of former pro-democracy newspaper founder Jimmy Lai, who could be sentenced to up to life in prison if convicted.

Barrister Robert Pang was representing the pro-democracy media tycoon in his fight against national security and sedition charges in the Chinese territory.