That the students were in possession of military grade weapons suggests that they might have been in contact with the illegal Soviet agents deployed to Poland for sabotage and espionage operations.

According to the article, Ławrynowicz, who was a member of an organisation that supported Józef Piłsudski, began shooting at the teachers with a revolver after being told that he had failed exams, whereupon other students tried to disarm him.

Immediately after this Obrapalski, his friend, rose from his place and fired several shots at the teachers, wounding a professor and several students, before throwing a hand grenade, which failed to explode.

[7] According to an article in the Neue Freie Presse three students carried out the attack, who were identified as Stanislaus Lawrynowicz, Janusz Obrembalski and Thaddäus Domanski, who was also named Ormanski[8] in other reports.

The newspaper reported that Lawrynowicz fired several shots at principal Bieganski, after most of the students had refused to take part at the exams, while at the same time Obrembalski began shooting at the teachers.