The man was arrested after a morning raid on an apartment in Nong Chok district on the eastern outskirts of the capital by security forces who allegedly found him with bomb-making equipment linked to the 17 August blast, which killed 20 people and wounded scores more.
A senior military official told AFP he believed the suspect was a "Turkish national" but Thai police have not yet confirmed his nationality. "We believe that the suspect was involved with the bombing" at the Erawan shrine, national police spokesman Prawut Thavornsiri said on a live televised broadcast Saturday evening.
He added that the foreign man was also involved in a blast the day after that bombing near a popular tourist pier, which sent people scurrying but caused no injuries. The suspect, now in military custody, has been charged with the "illegal possession of bomb-making materials" and was found with multiple passports, Prawut said in the broadcast.