LONDON — A man wielding a sword attacked members of the public and police officers in a east London suburb Tuesday, killing a 14-year-old boy and injuring four others, British authorities said. A 36-year-old man was arrested in a residential area near Hainault subway station, police said. The incident is not being treated as terror-related or a “targeted attack.” [time-brightcove not-tgx=”true”] Police said the 14-year-old died in the hospital from his injuries.