But the report does not identify those responsible for attacks on student buses, or the attack on the governor. Student leaders have denied the charges. The Iranian Parliament, which is controlled by reformists, has launched its own inquiry into the incident. Iranian observers say the latest development is part of a power struggle between conservatives who are close to Iran's supreme religious leader Ayatollah Ali Khamenei, and students and reformist leaders allied with President Khatami. Reformists control parts of the executive branch and took control of Parliament in elections last February.
Conservatives dominate Iran's judiciary and security services.
In recent months they have closed more than two-dozen reformist newspapers and imprisoned a number of editors and publishers, as the political climate heats up prior to presidential elections next year.