Hong Kong — Hong Kong police shot and wounded one protester who, hospital officials said, was in critical condition on Monday, as the Chinese-ruled territory spiralled into rare working-hours violence in its 24th straight week of pro-democracy unrest.

Police fired teargas in the Central business district where some protesters, crouching behind umbrellas, blocked streets as office workers on their lunch break crowded the pavements, and hurled antigovernment abuse...