Chinese artist and activist Ai Weiwei has been detained by the Chinese government since April 3. His family and loved ones have been given no information about his whereabouts or his condition.

An article in the Sydney Morning Herald gives more information.  I see in the Guardian that now his lawyer and a designer who works with him have also disappeared.

You can sign a petition through Change.org here.

See the Youtube clip of his installation piece  Sunflower Seeds here.