Thailand’s leader said on Tuesday he would invoke sweeping emergency powers in the face of surging coronavirus infections, and in a sign of toughening official action a man was arrested over allegations of creating panic on social media. Thailand and neighbouring Cambodia were among Southeast Asian countries accused by New York-based Human Rights Watch of using the pandemic to crack down on criticism. Thailand has the region’s second highest number of virus cases after Malaysia, with a total of 827 after 106 new infections were reported on Tuesday.