Hong Kong police dealing with anti-government protests have been armed with higher-level, lethal rifles in recent days, as radical protesters have stepped up their violence and use of weapons.
The mobs occupying universities have not only hurled bricks, metal poles and corrosive acid at police, but also used large quantities of petrol bombs, bows and arrows, as well as catapults.
An officer was pierced in the calf by an arrow outside Polytechnic University on Sunday. Another policeman was hit by a metal ball.
The mob rained petrol bombs on police, and even set an armoured riot-control truck ablaze. When a vehicle tried ramming into a group of officers, police responded by firing a live round.