Aww, you beat me to it..., well done.
I was listening to both tower frequencies all the time and did not hear anything. "Funny" thing is, a couple of minutes later a pilot inquired about that and the controller sarcastically replied something including the phrase " ... possibly 'terrorists' ..." (not knowing anything new; as if he had not yet received an update on the situation).
I have been looking through the archive but cannot find it.