The students had been given until yesterday to turning themselves in at Muang Khon Kaen Police Station for interrogation over charges of allegedly “joining forces with five others to stage political activities”.
Winthai said the police had taken a soft approach with the students, but if they refuse to cooperate, then strict action must be taken to enforce the law.
He added that if they did not show up, their bail guarantee of Bt50,000 would be seized and their parents summoned to meet police and face legal action.
Meanwhile, another nine students who had staged an anti-coup rally outside the Bangkok Art and Culture Centre have until today to report to police, or they too may face strict action.
“We have given them enough chances,’’ Winthai said.