One did die in Kuqa, but the decision to attack at 2am does not suggest an intention to cause widespread loss of life among ordinary citizens.

ECONOMIST: Xinjiang

However, the Globe and Mail, citing sources, said it involved a Toronto-New York City train, and New York Republican Representative Peter King said the attack was intended "to cause significant loss of human life including New Yorkers".

BBC: Iran denies link to Canada train 'al-Qaeda plot'