Bangkok bomb attack suspects Adem Karadag and Yusufu Mieraili have been forced to reenact their alleged role in bombing the Erawan Shrine, Thai police say.
Such re-enactments are standard police procedure in Thailand.
Earlier police said one of the men, named as Adem Karadag, was suspected of planting the bomb in the attack on August 17, contradicting what they had previously said.
The motive for the bombing, which killed 20 people, remains unclear.
Fourteen foreigners were among those killed.
Authorities now say they have enough evidence to prosecute the two men and say that Adem Karadag has confessed.
This contradicts earlier statements from police that neither of two men were the main suspects for the attack.
Adem Karadag, who has also been named as Bilal Mohammed, was arrested in late August in a raid on a flat on the eastern outskirts of Bangkok. His lawyer says he was not in Thailand at the time of the attack.
Police have released warrants for a total of 17 people over charges stemming from the attack.
The suspects are believed to carrying Chinese, Thai, Turkish and Pakistani passports, though their exact origins are unclear as some are thought to be using fake documents.
Many of the suspects named by Thai police have Muslim-sounding names, prompting speculation that they may be linked to jihadist networks or to Uighur separatist militants from China.
However, the police have not suggested that the attack was politically motivated.
The Erawan shrine – with its four-faced golden statue of the Hindu god Brahma – is considered sacred by Thai Buddhists, and attracts many foreign visitors.
Thai police have charged a suspect, who was named on a fake Turkish passport as Adem Karadag, in connection with the bomb attack that killed 20 people in Bangkok about two weeks ago.
Officers say the suspect, who was charged with illegal possession of weapons, was involved in the attack.
However, they say he is not the man seen on CCTV footage leaving a bag at the Erawan Shrine before the explosion.
The bomb tore through the crowded shrine on August 17, injuring more than 100, mostly tourists.
The man, who was described as a 28-year-old foreigner by police, was arrested in Nong Jok on the outskirts of Bangkok on August 29.
Thai army chief General Udomdej Sitabutr said the man had so far not co-operated with investigators.
“We have to conduct further interrogations and make him better understand so he will be more co-operative – while we have to be careful not to violate the suspect’s rights,” he told the AFP news agency on August 30.
The man’s nationality has not been confirmed but local reports suggest he could be from Turkey. Police said they found a large number of forged Turkish passports at his apartment.
Bomb-making materials also discovered in the property included ball bearings and piping, similar to what was used in the shrine attack, police said.
Police spokesman Prawut Thavornsiri said the man “is a culprit in the same network” as those behind the blast.
However, national police chief Somyot Pumpanmuang downplayed any suggestion that the suspect was connected to terrorism.
“He is a foreigner, but it’s unlikely he is an international terrorist. It’s a personal feud,” Somyot Pumpanmuang told a televised news conference.
“He got angry on behalf of his friends and family members,” he added without elaborating.
Meanwhile, Thai police have faced criticism for an image of a suicide bomb vest that was shown on television during the national broadcast announcing the suspect’s arrest on August 29.
The image caused a stir on social media and police later said it had nothing to do with the bombing or the suspect. Thailand’s ruling military accused broadcast media of inserting the erroneous picture.
A reward of one million Thai baht ($28,000) has been offered for information related to the Erawan Shrine attack.
Police released a photofit of the man seen leaving a bag at the site shortly before the blast, showing the suspect with dark hair and glasses.
Officials said at the time of the attack that they suspected it had been planned a month or more in advance and involved at least 10 people.
Erawan shrine is a popular destination for Chinese and Thai tourists.