Authorities said two of the dead were assailants, marking the attack as an apparent suicide bombing that hints at a further escalation in tactics, said Raffaello Pantucci, a terrorism expert at the Royal United Services Institute for Defense and Security Studies in London.
Attacks show bolder terror threat growing in China →
Pantucci said the fact that the attack took place in a relatively secure major city was also significant.
Attacks show bolder terror threat growing in China →
