Held to celebrate His Majesty’s 88th birthday, the event is scheduled to take place on December 11.
HRH Crown Prince Maha Vajiralongkorn will lead the bicycle parade in Bangkok.
Prawit said evidence on the plot was available in the forms of both hand-written texts and messages made via LINE chat programme.
As the deputy prime minister overseeing security affairs, Prawit urged the public to trust safety measures that relevant authorities would provide during the event.