A man upset about the Boston Globe’s coordinated editorial response to US President Donald Trump’s attacks on the media was arrested yesterday on charges he threatened to kill the newspaper’s journalists.

Robert Chain began calling the Boston newsroom after the Globe appealed to newspapers across the country to condemn what it called a “dirty war against the free press”, prosecutors said.

On 16 August, the day hundreds of editorials were published, Chain, 68, of the Encino section of Los Angeles, told a Globe employee that he was going to shoot employees in the head at 4pm, according to court documents.