HONG KONG—A former senior journalist at Hong Kong’s now-closed pro-democracy newspaper Apple Daily was released from custody on June 29, two days after he was arrested at the airport, media reported. Fung Wai-kong, 57, became the latest person from the media outlet to be targeted after a raid on the newspaper by 500 officers nearly two weeks ago, and the arrests of five executives, two of whom have been charged under a sweeping new national security law. Live footage showed Fung leaving a Hong Kong police station, but he declined to comment to reporters. In an email response for comment on Fung’s release, police said only that a male suspect had been released from custody. Investigations were ongoing and the person needed to report back to police in late July. It wasn’t immediately clear what the investigation into Fung was focused on. Fung is the seventh employee at the media …