Protesters tried to get on that bridge but officers blocked them. So far the protests have been peaceful. Now to the breaking news, once again, back in dallas, where tensions are very high once again there. The Police Department has received an anonymous threat against Law Enforcement yet again. New video just into the newsroom shows officers searching a Police Parking garage for a suspicious person. Some witnesses from the scene say that officers are taking cover, but as you can see, not wearing any sort of headgear or protective clothing other than their uniforms. Live pictures from our nbc chopper in dallas right now. Theyve asked the media, local and national, helicopter and otherwise, to sort of stay back. Theyve pushed them back from Police Headquarters there. They want to make sure theyre keeping the situation protected. Were continuing to monitor this situation. Well bring you updates as soon as we get new information. But a very active scene there. New details about the gunman