Sunday night’s violent attack on students in a Tehran University dorm by police and religious militia members has exposed fault lines at the highest levels of Iranian government.

Yesterday, a group of parliamentarians visited the campus and spoke with students. After that visit, they called upon the government to release all those arrested and fire those responsible for the attack. In response, parliament speaker Ali Larijani, a longtime Ahmadinejad rival, announced the creation of an investigatory committee to investigate the incident.

Reports have circulated in the last 24 hours that as many as five students — three men and two women — were killed in the assault. The chancellor of the university has denied that any deaths occurred, but condemnation of the incident has been growing, as Speaker Larijani has publicly asked “What does it mean that in the middle of the night students are attacked in their dormitory?”

At the mass rally held yesterday, presidential candidate Ali Mousavi charged that the government had “attacked dormitories and brutally broken legs, heads, arms, [thrown] some of the students out of the windows, and arrested a lot of people.” Today, some eight hundred students are reported to have staged a sit-in at the university’s gates.

Iran is a young country, and its students have for decades stood at the forefront of political agitation. The Tehran University incident is not the only violent campus assault to occur since last Friday’s election, but it appears to be galvanizing — and polarizing — the country in a way that the others have not.

If the uprising now taking place in Iran does grow into a true rebellion, the Tehran University dormitory assault of June 14 will likely be seen as a turning point in the struggle.

3 pm update: The Chronicle of Higher Education has finally picked up the Tehran University story.

5 pm update: The chancellor of Shiraz University has resigned in protest over a similar attack there.