At the same time, the universities and other places associated with students were placed under strict surveillance. At the order of the Ministry of Education, actions against students were taken by university administrators: students who were suspected of having approved the movement were expelled and a strict system of surveillance was put in place to monitor the behaviour of students. Additionally, student organisations (UTM as well as the Union of Student Associations/"Uniunea Asociaţiilor Studenţeşti") organised sessions to unmask "enemy elements". At these sessions, not only were students removed from these organisations, but it was asked that they be expelled – a request immediately granted by the university administration. Those expelled had no right to re-enroll in any institution of higher learning. Sessions were organised at which students were obliged to express their indignation against those who "splatter with mud" Romania's studious youth. Furthermore, the principal protest organisers were unmasked in public sessions during which their expulsion was requested in view of their status as people enemy to the regime. These actions were coordinated by university party organisations as well as by Marxism-Leninism departments. (One especially zealous persecutor during this period was Constantin Bulai, who taught Marxism.) Students convinced professors and artists to sign petitions asking that those arrested be freed; as a result, repressive actions intensified and more were condemned and expelled.