Hong Kong's pro-democracy protesters were bracing for a possible police crackdown on Sunday as their campaign entered its second week.<br/> <br />The protesters have agreed to allow access to government buildings next week for civil servants to get back to work.<br/> <br />But they're defying calls from Hong Kong's chief executive to end their protests.<br/> <br />Tens of thousands have spent the past week staging sit-ins across Hong Kong.<br/> <br />They're demanding the resignation of the city's Chief Executive and a reversal of Beijing's decision not to allow a free choice of candidates for the 2017 leadership election.<br/> <br />The demonstrations have been largely peaceful since police fired tear gas last weekend.<br/> <br />There were scuffles late on Friday with police struggling to control rival groups of pro-democracy and pro-Beijing supporters in the Mong Kok district.<br/> <br />Tensions were still running high in the area on Sunday as police maintained a high-profile presence.