Arrest warrants have been issued for three more suspects linked to Bangkok's multiple bomb attacks, taking the total number of suspects to seven.
The suspects will face charges for organised crime, arson and illegal possession of explosives.
Police are yet to nab the first four suspects, despite announcing a 100,000 baht ($3,245) reward for their information last week.
A series of bombs went off on August 2 as foreign ministers of Southeast Asian nations met in Bangkok. It left four people wounded.

Kenya offers temporary amnesty to undocumented East Africans amid crackdown fears
7 Indonesian airports remain shut due to volcanic ash from Anak Krakatau
Bolivia confirms 7 deaths after military base explosion
Israeli strikes on southern Lebanese town kill 11, state news agency saysÂ
Nepal marks national mourning day after deadly flood
Far-right AfD wins historic victory in German state election
At least 5 killed in Amazon Prime Air cargo plane crash in Miami
Israeli strike kills 2 in Gaza, medics say
