Five days after the violence, this intelligence summary indicates that, "Numerous arrests can be expected," and that the military appears poised to take over the university campuses. The document suggests that Chinese leaders have initiated a defensive campaign combining mass arrests and detentions with vehement denials that there were heavy civilian casualties during the military crackdown, "focusing instead on attacks and atrocities against the police and soldiers." With regard to the brewing leadership crisis, the report cites a "reliable source" who says that "Zhao [Ziyang] is still in Beijing and in the custody of the hard-liners."
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Original source: http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB16/documents/index.html#d23