Panic

Thousands of humans were killed every single minute , as the automatic rifles open fired , however the cultivators who had managed to kill the army men now wore their bullet proof armours and used their broken tanks to protect themselves while going forward. 

It was sheer chaos , and no matter how hard the policemen tried to hit the alarms , the sirens would not ring out and they had trouble alerting the back-up forces with the internal communications being jammed. 

Ethan Grey had really integrated a lot of security measures , however the master control to internal communications was still inside the grey international tower and with the defenses planned to keep outsiders from interfering and not insiders , it was still jammed by the inside man.