Bangkok suspect handed device to shrine bomber: police

BANGKOK: A key suspect in last month's deadly Bangkok blast handed the backpack bomb over to a man in a yellow t-shirt later seen placing it at a busy shrine, Thai police said on Wednesday.

Mystery surrounds the motive of the alleged network behind the August 17 bombing that left 20 people dead in the heart of Bangkok and rocked Thailand's key tourist industry.

But after appearing flat-footed in response to the unprecedented attack on Thailand, police have trumpeted the arrest of two foreigners and say they have identified several other suspects.

One of the two men in custody, Yusufu Mieraili, was arrested last week near the border with Cambodia and has since been quizzed by military and police investigators.

Mieraili, 25, who was detained in possession of a Chinese passport, has confessed to playing a central role in the operation, according to police.

On Wednesday he was taken on a second re-enactment of his alleged role in the crime -- a standard police procedure.

"This is the area where he met the man in a yellow shirt to exchange the backpack," national police spokesman Prawut Thavornsiri told reporters outside a Bangkok railway station.

Mieraili, whose hands were bound while he wore a bulletproof vest during the re-enactment, handed a "heavy backpack" to the bomber outside the station, Prawut said.

That man was seen on security footage apparently placing the same bag at the shrine and calmly walking off moments before the blast.

After making the exchange, Prawut said Mieraili was then ordered to travel to the shrine to take photos of the aftermath of the bomb.

But when he got there his view was blocked by a pillar so he left, Prawut added.

Police have not revealed Mieraili's nationality, although the birthplace on the passport he was found with is listed as Xinjiang -- home to China's Muslim Uighur minority and often hit by unrest.

Speculation has hardened on links to China's Turkic-speaking Uighur minority, many of whom complain of religious and cultural discrimination.

Thailand deported scores of Uighurs to China early in the summer, prompting protests in Turkey where some nationalists hold a deep affinity with the minority group.

A second man identified as Adem Karadag was caught before Mieraili in a flat in a Bangkok suburb with bomb-making paraphernalia and dozens of fake Turkish passports.

Police have said neither man is thought to have physically planted the bomb.

But they are confident the pair are involved in the network blamed for the attack.

The total number of people wanted for suspected involvement in the deadly attack stands at 10, in addition to the two arrested foreigners.

They include a Thai Muslim woman and her Turkish husband, both of whom are believed to be in Turkey.

Local media reports have named the bomb mastermind as "Izan", saying he commissioned the attack but left the country a day before it was carried out.

But on Wednesday Prawut refused to comment on that theory.

Despite the mounting evidence of a possible Uighur link, Thailand's police and junta have been at pains to rule out the idea that the Chinese were deliberately targeted.

Instead police say the bombing was carried out by a criminal network motivated by revenge after a people-smuggling trade was disrupted -- a line security experts have met with scepticism.

Other theories for the bombing have touched on Thailand's bitter political divisions, global Islamic terrorism as well as a festering insurgency in the kingdom's south.