The military has released Sawatree Suksri, law academic from Thammasat University and member of Nitirat group, from detention around 10pm of Monday.
The military escorted her home after a full-day interogation at the Army Club at Thevet since Monday morning. She was detained at a military camp in eastern Prachinburi province for two nights.
The military did not press any charge against her, according to a source.
Sawatree was arrested at Bangkok international Suvarnabhumi Airport on Saturday afternoon after she travelled back from the United States, on a study trip on human rights, funded by US Department of States.