Bangkok blast: Thai police release main suspect's sketch

Thai police have released a sketch of the main suspect of Bangkok blast that killed 20 people at Erawan shrine on Monday.

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The suspect is believed to be a young man who entered the shrine in a yellow T-shirt with a backpack and then left without it, as per the security camera footage, the BBC reported.

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Thailand's chief of police said that there was a "network" behind the attack.

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Thai Prime Minister Prayuth Chan-ocha has described the incident as the worst-ever attack on Thailand.