At least 10 people may have taken part in the bombing. Royal Thai Police Commissioner Gen. Somyot Poompanmoung said Thursday he believes "several teams" were involved in the preparation and execution of the attack, which killed at least 20 people and wounded more than 120…..
"This operation was carried out by a big network," he said.
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But the bespectacled man, who was seen leaving a backpack at the Erawan Shrine shortly before the explosion, remains on the run.
Thai police have released a sketch of Bangkok bombing suspect. Picture: Royal Thai Police (The Australian)
There are fears he may have fled overseas after being dropped off by a motorcycle taxi driver at Lumpini Park, in central Bangkok after the attack on Monday night.
Moment Bangkok Bomb Exploded Caught On VIDEO:
Half of the victims were tourists — all the earmarks of jihad.
In the new footage, he is shown carefully and deliberately removing his backpack inside the shrine, getting up without it and immediately leaving the scene.
The spot where he was sitting is precisely where the bomb went off a few minutes later, says the BBC's Jonathan Head in Bangkok.
"There is a suspect… we are looking for this guy," Prime Minister Prayuth Chan-ocha told reporters.
Authorities were "quite close" to identifying the suspect, Thai government spokesman Maj Gen Weerachon Sukhontapatipak told the BBC, but other leads were also being pursued.
He said no motive was being ruled out, but that the bomber did not appear to be Thai and the character of the bombing was "quite different" from previous bombings by southern Thai insurgents.
He said security at transport hubs and tourist sites was being beefed up.
New footage capturing the moment that an explosion ripped through a shrine in Thailand has emerged.
The footage was captured by a Chinese tourist.
It shows the moment of the blast as terrified tourists begin screaming and running.
One man, speaking in Mandarin, is heard saying: "What's happening?"
More than 20 people including several foreigners were killed and more than 120 injured when the device detonated at the Erawan shrine in Bangkok.