The 28-year-old man, who was not identified and was arrested from his rented apartment in Nong Chok district in a suburb in eastern Bangkok, was also found in possession of multiple passports.
The Indian who hails from Bengaluru has been working with a Information Technology service company in Thailand and his record was found clear, official sources said on Wednesday.
Thailand's Erawan Brahma temple, one of the most popular tourist attractions in Bangkok, was reopened on Wednesday for worshippers and tourists three days after a blast at the shrine killed 20 people, as police intensified their hunt for a suspect believed to be the bomber.
Thailand on Thursday said over 10 people were involved in carefully plotting the deadly attack at the Brahma temple Bangkok while ruling out involvement of global terror groups, even as it sought Interpol help in tracking down a foreign man suspected of planting explosives.
The two Indians, who were not identified, have been taken to a military camp for questioning, The Nation quoted the police as saying.
Cops believe he is part of a network and announced a reward of 1 million baht (Rs 18 lakh) for information leading to his arrest.
A series of blasts rocked Thailand, including two famous tourist spots popular with foreigners, within 12 hours, killing four persons and injuring several others.