A group of 27 senators Monday sought a ruling from the Constitutional Court as to whether Prime Minister Yingluck Shinawtra violated the charter over the case of transfer of Thawil Pliensri.

Caretaker Prime Minister Yingluck Shinawatra Monday denied that she was using delay tactic to further delay the reinstatement of Thawil Pliensri as the secretary general of the Council of State.