Police in Hong Kong battled pro-democracy protesters at several university campuses in sometimes savage clashes, as parts of the city were paralyzed, including Hong Kong's Central financial district, which was tear-gassed for a second day running.

The flare-ups occurred a day after police shot an unarmed protester at close range and a man was doused with gasoline and set on fire in some of the worst violence since the protests began nearly five months ago in the China-ruled city.

At the rural Chinese University near Tai Po, some of the fiercest fighting broke out at night as riot police stormed the campus where hundreds of protesters congregated, firing a barrage of tear gas, rubber bullets and water cannon.