https://apnews.com/5d193a73674780b3851ee02e6e3c0a4e > HONG KONG (AP) — Hong Kong police have signaled their intent to enforce a new Chinese national security law strictly, arresting four youths Wednesday on suspicion of inciting secession through social media posts. > Three males and one female, aged 16 to 21, were detained, a police official said at an 11 p.m. news conference. All are believed to be students.