Police said the Erawan shrine and Sathon pier bombings might have also been politically motivated as one of the two Thai suspects had been involved in the Nonthaburi apartment bombing in 2010.

But the main motive of the Aug 17-18 bombings was revenge by human traffickers, especially of Uighurs, whose business had been destroyed by a heavy crackdown, police said at a briefing on Monday afternoon.

Read more: Bangkok Post