<p>Students at Thammasat University&rsquo;s Rangsit campus kept watch through the night around the Jpark student hall, after Panusaya Sithijirawattanakul and Parit Chiwarak, leaders of the Student Union of Thailand (SUT), posted on their Facebook profile pages last night (12 August) that they were being stalked by plainclothes police officers and were concerned that they were about to be arrested.</p>