Authorities have said they believe the August 17 bombing, which killed 20 people and injured more than 120, was carried out by a people smuggling gang seeking revenge for having their operation curbed.
While a presentation to the media today mostly summed up information released in recent days, National Police Chief Somyot Poomphanmuang said that two different groups may have been involved, and that a Thai suspect still at large had been tied to bombings in 2010 and 2014.