Army and police neutral in Iran?

From a reader after speaking with his father in Iran, quoted by Andrew Sullivan

The police is just watching and the army has declared neutrality. The violence is 100% caused by the BASIJ and thugs who are roaming the streets

It could be the army and police are using the paramilitaries as proxies, but I doubt it. Anatomy of a Revolution, a classic book on the subject says, the only thing absolutely necessary for a revolution to succeed is that, at the very least, the army does nothing.

Could we being seeing that? If so, it would be momentous.