Hong Kong police pledged to track down the developer of a fake [Covid](tag?_=covid) -19 contact-tracing app on Tuesday, as three government employees were suspended after being arrested for using it to circumvent new entry rules for public premises. Two Immigration Department officers and an Audit Commission staff member were among five people arrested on Monday over fake versions of the “Leave Home Safe” app on the day its use became mandatory for entering public buildings. As of 5pm on Tuesday, the five suspects, aged 22 to 45, including two contractors working on site, were still being held for questioning, and…