Here "news" refers to the messenger who went to speak the news. Alternate translation: "someone gave news to the chief captain of the cohort" (See: [[rc://en/ta/man/jit/figs-metonymy]])
The phrase "came up to" is used because the chief captain was in a fortress connected to the temple that was higher in elevation than the temple courtyard.
The word "Jerusalem" here represents the people of Jerusalem. The word "all" is an exaggeration to show a large crowd was upset. Alternate translation: "all the people in Jerusalem were in an uproar" or "the large crowd in Jerusalem was in an uproar" (See: [[rc://en/ta/man/jit/figs-metonymy]] and [[rc://en/ta/man/jit/figs-hyperbole]] )