The regime on Friday lodged a complaint with police against a group of 57 pro-election activists who staged a demonstration in front of the Royal Thai Army headquarters last week.
Col Burin Thongprapai, an army staff judge advocate, who represents the National Council for Peace and Order (NCPO), lodged the complaint with investigators at Chana Songkhram police station. There were 57 suspects named in the lawsuit.
The leaders are Karn Phongpraphaphan, Sirawith Seritiwat, Rangsiman Rome, Nattha Mahatthana, Thanawat Promchak, Ekachai Hongkangwan, Chokchai Paiboonratchata, Anon Nampa, Pakorn Areekul and Sripai Nonsee.
The suspects have been accused of "using unconstitutional means to incite the public to disobey the law".
On March 24, the pro-election activists marched from Thammasat University's Tha Prachan campus to the Royal Thai Army headquarters on Ratchadamnoen Nok Avenue.
They broke through police barricades set up to prevent them from disrupting traffic during the demonstration, said police.
Investigators were also considering charging the suspects with defying police orders and injuring officers as well as an additional charge of illegally using vehicles fitted with loudspeakers, according to police.