Risking expulsion and possible arrest, 88 professors at Tehran University signed a letter on Monday calling on Ayatollah Ali Khamenei, the country's supreme religious leader, to end the use of violence against protesters, saying it was a sign of the government's weakness.
"Nighttime attacks on defenseless student dormitories and daytime assaults on students at university campuses, venues of education and learning, is not a sign of strength," the letter read in part. "Nor is beating up students and their mass imprisonment."
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