Sirawit was captured by troops in front of Thammasat University’s Rangsit late Wednesday night.
The three other activists were arrested when they visited Sirawit at the Nimitr Mai police station Thursday morning. They were identified as Chonthicha Jaengrew, Chanoknan Ruamsup and Korakot Saengyenphan.
Sirawit and the three other activists were charged with violating the coup order against holding political rallies after they organised a train trip to Hua Hin, heading to the Rajabhakti Park.
When they were taken to the court, Chonthicha raised her fist as a sign of defiance against the junta and coup.
At press time, the court has yet to approve the detention request of police.