Thai police spokesman said on Wednesday the fingerprints of the second suspect arrested on the Thai border with Cambodia matched those found on bomb making equipment at a flat.
"Today, the fingerprint result from investigators confirmed that the man's fingerprints matched with [those found on] a bottle that contained explosive contents which was found in room 414 at Poon-anant Apartment," Thai Police Spokesman Prawut Thawornsiri said.
"We are able to confirm that he was involved in the blast incident."
The unidentified suspect is the second foreigner believed to be linked to the deadly blasts on Aug. 17 and 18 in Bangkok. He was arrested in Sa Kaeo province, east of Bangkok on the border with Cambodia. He was being transferred to Bangkok for interrogation.
Thai police spokesman Prawut Thawornsiri said a foreign man arrested by Thai police on Tuesday played a key role in the deadly bombing that blasted through the shrine in Bangkok.
The Thai police raided an apartment in Nong Chok of Bangkok on Saturday. They arrested another suspect and found bomb making equipment and dozens of fake Turkish passports.
The identity and nationality of the first unnamed suspect has become a matter of controversy shortly after his arrest as one of the passports found in his apartment indicated he was a Turkish citizen.
Later a Thai National Police spokesman confirmed that the document was fake and they do not know the man’s nationality.
Turkey’s Bangkok Embassy also told local authorities in Thailand that the suspect is not a Turkish citizen.
The police did not confirm the men’s nationalities. Both of the arrested men are now in military custody.
Meanwhile, a senior officer said on Wednesday that the man arrested on the border with Cambodian border on Tuesday talked to interrogators through an interpreter.
"He speaks Turkey's language," incoming Thai police chief General Chaktip Chaijinda told reporters. He did not specify whether the language he spoke was Turkish or a member of the wider Turkic family.
Thai media showed a picture of a Chinese passport found on the second man arrested on the Cambodian border. Accordind to the passport, the name of arrestee was Yusufu Mieraili and his birthplace was Xinjiang.
When Chaktip was asked whether the man was a Uighur, he replied, "The passport says so. But we have to wait for confirmation."
Among seven others of arrest warrants, only a Thai woman has been identified. She said to AFP that she is currently in Turkey but did not involve in the deadly blasts occured in Bangkok.