Chinese demolition workers have torn down the Shanghai studio of the artist Ai Weiwei - a move he says is linked to his political activism.
Mr Ai said the demolition crews arrived without warning on Tuesday and flattened the building within a day.
He originally had permission to build the studio, but later officials ordered it to be destroyed, saying he had failed to follow planning procedures.
Mr Ai has been increasingly vocal in his criticism of China's leaders.
The 53-year-old, one of China's most famous and controversial artists, said the demolition started in the night and he flew from Beijing to Shanghai as soon as he heard.
Mr Ai told the BBC Chinese service why he believed the building was destroyed: "They wanted to demolish it overnight without us finding out because they were worried the demolition would attract attention.
"We asked why it was demolished earlier than when we were told and they just answered that sooner or later, it would have been done anyway."