Hong Kong police charged the chief editor and chief executive of pro-democracy tabloid Apple Daily on Friday with collusion with a foreign country, a national security case that has sent chills through the city's media.

On Thursday, 500 police raided the media outlet and officers were seen sitting in front of computers in the newsroom after the arrest of five Apple Daily executives at dawn on suspicion that dozens of its articles violated Hong Kong's new security law.

Police said...