He believes Chinese authorities want to keep him silent during an international human rights meeting.
A list of arrest warrants sheds light on the previously unreported incident.
The Istanbul University student is picked up by Chinese police just before taking a flight to Turkey.
Sources say the statement renews hope that Washington is listening to their concerns.
Chinese authorities tighten restrictions during the holy month of Ramadan.
A Uyghur suspect is shot and killed after allegedly stabbing a police officer to death.
Beijing holds 'anti-terrorism' drills in Xinjiang on the anniversary of the July 5, 2009 violence in the restive region.
An outspoken Uyghur scholar is put under house arrest ahead of a sensitive anniversary in China's restive Xinjiang region.
Beijing beefs up security in Xinjiang after a spate of violence ahead of a sensitive anniversary.