For a month after being beaten and detained by Chinese police, artist Ai Weiwei had complained of constant headaches. While in Munich to install a show, he went to a doctor, who sent him into emergency surgery to alleviate a cerebral hemorrhage. The news was reported, of all places, by the editor's blog at Frieze magazine, which published accounts from his assistant and one of the artist's fellow activists involved in publicizing the names of 5,000 children killed in school collapses in the Sichuan earthquake.
Ai has been publishing photos and updates [in Chinese] on Twitter.
Ai Weiwei in hospital after police brutality [frieze.com]
Ai Weiwei erhebt schwere Vorwürfe gegen Peking [sueddeutsche zeitung]