An especially violent day in Hong Kong

Confrontations continued into the night after Carrie Lam, the chief executive, condemned Monday’s unrest, saying the protesters were bringing the territory “to the brink of no return” and vowing not to answer their demands.

From the early morning, Monday’s demonstrations were ugly. A police officer shot an antigovernment protester at point-blank range, the third police shooting since the protests began, while across town a man arguing with protesters was set on fire. Both were in critical condition.

Escalation: Clashes spread in ways they had not before — including onto the campuses of the territory’s universities — as protesters hurled petrol bombs and the police fired tear gas during working hours.

A vast network of volunteers, mostly ordinary people, sustains the movement. Some hand out bottled water and red bean soup and drive stranded protesters home late at night.