China has executed a scientist accused of spying for Taiwan.
The family of Wo Weihan, 59, had appealed for clemency, saying that he was tortured into admitting that he was a spy. He was sentenced last year.
Mr Weihan, who ran his own medical research company in Beijing, was arrested in early 2005.
He was convicted of passing Chinese military secrets to Taiwan, which China considers a renegade province.
Court documents said he spied for an organisation called The Grand Alliance for the Reunification of China under the Three Principles of the People between 1989 and 2003.
This group is under the auspices of Taiwan's new ruling party, the Kuomintang, according to China.
His daughter, Ran Chen, who holds an Austrian passport, said her father's death has been confirmed by the Austrian embassy in Beijing.