In the capital, police seal off roads to stop people airing their grievances Police blocked the streets around Zhongnanhai - the central leadership's private residential compound - yesterday to stop people from protesting over housing demolition payouts and other grievances against the government. A protest organiser, who gave his surname as Guan, said police were apparently tipped off about the plan and tracked him down on Monday night to question him. He said police took him into custody for several hours. 'I didn't do anything illegal,' Mr Guan said. 'I don't know how they found out it was me.' At 9am, the scheduled starting time of the protest, police blocked the pavement near the three entrances to Zhonghanhai, diverting heavy commuter traffic. Officers also blocked a side street, and police wagons patrolled the area which includes Tiananmen Square. Yesterday's protest would have been the culmination of two months' demonstrations, showing that people upset with the government are now becoming more unified. Last month Mr Guan helped to organise a protest by 50 people in front of the Ministry of Land and Resources. They raised allegations of unfair compensation for the demolition of their old homes. A week later he organised a gathering near the city offices to protest against unsettled grievances dating back to the days of the Cultural Revolution, that took place between 1966 and 1976. On June 16, about 1,000 people demonstrated at Beijing's City Hall to accuse a vice-mayor of luring them with a graveyard site sale in the late 1990s. The sales were declared illegal in 2001, causing investors to lose their money. Mr Guan said some of the jilted gravesite buyers had also planned to demonstrate yesterday.