oleg boldyrev, bbc news, moscow. been engulfed by huge anti—government protests for nearly eight weeks now, and it's still unclear how china will react to the increasingly violent demonstrations. in the latest confrontation, police fired tear gas at an unauthorised protest held by tens of thousands of people to condemn an attack by armed masked men last week. nick beake reports from hong kong. tear gas, rubber bullets, and anger fill the stifling summer air. welcome to another weekend in hong kong. this is now the rhythm of life. you find a police force trying to contain an eighth consecutive week of demonstrations. and these are the protesters who won't back down — tens of thousands of them. "shame on you," they shout, towards officers they say failed to protect them last weekend here in the town of yuen long, near the chinese border. men in white, suspected to be triad gang members, had attacked pro—democracy activists at a metro station, sending more than a0 to hospital. hong kong police had tried to ban today's m