Hong Kong police fired water cannons and volleys of tear gas to break up protesters throwing petrol bombs and bricks near the Legislative Council building and central government offices Sunday, the latest in weeks of sometimes violent unrest.

Some protesters threw bricks at police outside the nearby Chinese People's Liberation Army base in the city and tore down and set fire to a red banner proclaiming the 70th anniversary on Oct. 1 of the founding of the People's Republic of China.

One water cannon caught fire after being hit by a petrol bomb. The water cannon fired blue jets of water, used elsewhere in the world to help identify protesters later.