Security authorities have been assigned to keep a close watch on the situation to ensure the safety of the public.
The premier was speaking after police raided a building in Samut Sakhon province and confiscated bomb-making ingredients including fertilisers and liquid ammonium nitrate.
The raid was made after terror suspect, Hussein Atris, of Swedish-Lebanese origin was arrested at a Bangkok airport. He confessed and led police to the building, which was reportedly used for the storage of explosive elements.
Meanwhile, Metropolitan Police Commissioner Pol Lt Gen Winai Thongsong said the public should not worry about Thailand being the target of a terrorist attack, as it seemed the country was being used for storage and transit.
Police have reinforced their personnel and safety measures in many areas and particularly where foreign tourists gather, such as Khao San Road, Bang Lamphu, Rambutree Road as well as the embassies of the US and Israel.
Deputy PM Kowit Wattana also expressed confidence that the security authorities would be able to provide safety for people and important venues.