In Hong Kong, riot police on Saturday fired multiple rounds of teargas on thousands of demonstrators surrounding the government headquarters, escalating tensions on the city's 13th straight weekend of mass protests. <br />'' <br />'' Today protesters clad in all black, wearing helmets, gas masks and body armour, converged on the government headquarters after marching across the city in defiance of a police ban a day after a wave of arrests of prominent pro-democracy activists. Protesters lit fires and attacked the Legislative Council building.<br />'' <br />'' Police had banned Saturday's march to mark the anniversary of a decision by Beijing to limit democratic reforms in the semi-autonomous Chinese territory. <br />'' <br />'' The protest movement grew out of rallies against a controversial extradition bill – now suspended – which would have allowed criminal suspects to be sent to mainland China for trial. It has since become a broader pro-democracy movement in which clashes have grown more violent.<br />''