Update | Human rights lawyer among four detained over Tiananmen commemoration event
After a seminar involving some 15 people at a private home, at least four are placed in criminal detention and may be prosecuted

At least four prominent participants at a low-key event commemorating the 25th anniversary of the crackdown on the Tiananmen pro-democracy movement have been placed under criminal detention, their lawyers and families said yesterday.
One thing that is certain is that it was not an uprising; even the authorities don’t say that
Liberal scholar Xu Youyu and cyberactivist Liu Di were both placed in criminal detention yesterday after attending a seminar involving 15 people at a private home in Beijing on Saturday, their lawyer, Shang Baojun said last night.
Police took Xu away on Monday and questioned Liu on Sunday. Shang said they were likely to be accused of "picking quarrels and provoking trouble".
Human rights lawyer Pu Zhiqiang , who took part in the Tiananmen protests as a student in 1989, was criminally detained yesterday at the Beijing Number One Detention Centre for "picking quarrels and provoking trouble", his friend and fellow lawyer, Si Weijiang, said.
Dissident writer and Christian house church leader Hu Shigen was also placed under criminal detention on the same charge yesterday, his brother said.
The website of rights group Chinese Rights Defenders reported that scholar Hao Jian had also been criminally detained, but this could not be independently verified.
Under mainland law, police can hold people for up to 30 days in criminal detention before deciding whether to pass the case to prosecutors.
The whereabouts of former lecturer Liang Xiaoyan remained unknown, rights activist Hu Jia said.