He told protesters at the Nang Lerng and Democracy Monument rally sites that army chief Prayuth Chan-ocha and police chief Adul Saengsingkaew agreed to attend the dialogue, if approved by the supreme commander.
Mr Suthep said he unsuccessfully attempted to contact the supreme commander the whole of yesterday afternoon but he would not give up.
He set 8 pm today as deadline for the meeting, saying he intended to explain to the armed forces and police leaders the principle of political reform. He would be accompanied by 40 members of the People’s Democratic Reform Committee.
He said he would spell out the details and let the top brass decide if they would join the reform.
Clarifying misunderstanding on restructuring the police system, Mr Suthep said the idea was to let police in each province be under the supervision of provincial governor who will be directly elected by the people.