London, Aug 19 : Thai police have released asketch of the main suspect of Bangkok blast that killed 20 people at Erawan shrine on Monday. 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. (Read: Bangkok blast: Cambodia beefs up security after the deadly bomb blast)

Thailand’s chief of police said that there was a “network” behind the attack. Thai Prime Minister Prayuth Chan-ocha has described the incident as the worst-ever attack onThailand.