The warrants were issued after the court had received evidences from Thon Buri Railway Police, who had summoned 11 activists related to the case twice, on December 22 and January 8, a source said.
Only five of the activists have so far reported to police, the source said, adding that the rest did appear at the police station but did not give themselves in.
The six activists facing arrest are members of the New Democracy Movement, namely Sirawith Seritiwat, Cholticha Jaengrew, Chanoknan Ruamsap, Korakoch Saengyenpan, Apisit Sapnapapan and Thanet Anantawong.