The repression under the ‘Strike Hard’ campaign became permanent. Anyone suspected of sympathies for ‘separatism’ – advocating an independent Uighur state – or involvement in ‘illegal religious activities’, primarily with the Sufi brotherhoods – could be detained without trial. Attempts by family members to extract relatives from police stations or other detention facilities have led to frequent clashes with the authorities, many of which have turned violent. Sporadic attacks against the police or other symbols of Chinese rule, either by local people or armed militant groups, were followed by government reprisals. Most conflict occurred in the old Sufi strongholds in the south of Xinjiang but, in July 2009, clashes between Uighurs and Han Chinese in the regional capital, Urumqi, cost many lives. They also resulted in the detention of thousands of Uighurs, some of whom were executed, and the eventual replacement in April 2010 of the Xinjiang Communist Party Secretary, Wang Lequan, who had held the post since 1994. The level of repression and the secrecy of judicial processes aroused widespread international concerns about human rights abuses.