“The Thai police said on Wednesday that their main suspect in a deadly attack on a Bangkok shrine has a Chinese passport indicating that he is from the far western region of Xinjiang but that they had not yet verified whether the passport was authentic. If confirmed, that information would strengthen the case made by some security analysts that the Aug. 17 bombing of the Erawan Shrine — which killed 20 people, including many ethnic Chinese tourists — was connected to the political grievances of Uighurs, a Turkic, mostly Muslim people. Uighurs in Xinjiang say they are oppressed by the ethnic Han, who dominate China.”
Source: Passport Hints at a Uighur Link in Bangkok Bombing – The New York Times