Thai police say that a positive finger print match has been established between the second person arrested on Tuesday and prints found on the bomb making material from the deadly bombing of a shrine in Bangkok on Aug. 17, reports The Washington Post.

Thai Prime Minister Prayuth Chan-ocha, announced that authorities had arrested a man they believe is the "main suspect" - the yellow-shirted man in a surveillance video - who police say is part of a group responsible for the bombing at the shrine in central Bangkok, according to Al Jazeera.

The unidentified man, a foreigner who speaks English, was arrested in Thailand near the Thai-Cambodian border while trying to cross over illegally, said national police spokesman Lt. Gen. Prawut Thavornsiri, according to CNN.

The suspect has been charged with possessing illegal explosives as bomb-making materials and forged passports that were found at the apartment where he was staying in Nong Jok on the outskirts of Bangkok, the police said, according to the BBC.

While Thai authorities have not come forth with any explanation about the possible motives behind the shrine attack, Lt. Gen. Thavornsiri was more open when he said the perpetrators might be members of a "syndicate" involved in producing fake passports and smuggling people across borders.

"This may have been a revenge attack. They held a grudge against officials," said Thavornsiri, according to The New York Times.

With three more arrest warrants being issued by the authorities, the total is now seven.

Meanwhile security analysts opine that the attack may have been carried out as revenge for Thailand's repatriation of more than 100 Uighurs to China in July, by members of the Uighur ethnic minority.