Transcript for Ferguson Police Get Helping Hand From the National Guard
It's been more than a week now and we have not had a quiet night here Ferguson the National Guard is now here. You can see the troops here they're guarding the police command post this is where all the staging has been four officers have been responding to the unrest in the city. There was an incident here and -- ago that seriously concerned authorities here. Who worried that some demonstrators were. Coming and firing guns in the area so the National Guard -- has -- national artists come attempted to protect protect these people here. Overnight there was a new police tactics of -- police instead of trying to live with the demonstrators were basically tell them telling them they could march but. They had to keep -- moving. Keep it moving no standing still and they were arresting people. Who stood still at 1 point in the evening a large group of demonstrators decided they weren't moving anymore. And according to police started throwing rocks and bottles although the demonstrators say. They were only throwing water bottles that led to an unusual exchange police. All sounding off these ear piercing sirens it was a deafening sound. You saw people. Putting their hands in the years in their ears because it was so loud then after that. Came the tear gas. And the air grenades that were exploding into the air. We saw images that look like they were from the Middle East people who were suffering from the tear gas and dealing all with all of that. There is. No and inside it appears for the tensions that exist here the officer has been named in the shooting of Michael Brown. The autopsy is are coming in. And prosecutors here are trying to get this case before a grand jury to determine if there will be charges. I'm -- Tommy and purpose in Missouri.
This transcript has been automatically generated and may not be 100% accurate.