UDD leaders, who were released, included UDD chairman Jatuporn Prompan, Nuttawut Saikuar, Pracha Promnog, Virakarn Musigapong Weng Tojirakarn and Thida Tavonseth.
The martial law allows authorities to detain people without charges for seven days. Without evidences for charging them in court, they must be released.
The red-shirt leaders were released at 2:30 pm.
Before their release, troops brought them to the Army Auditorium in Thewes at 8:30 am.
Most of the red-shirt leaders were detained shortly before the NCPO seized power last Thursday. They were detained along with several leaders of the People’s Democratic Reform Committee, who were released Tuesday.