UPDATES: Dallas Morning News is reporting 7 officers have been wounded.

Dallas PD says "two suspicious devices" were found at the scene.

Fox News is reporting the fourth suspect has died from a self-inflicted gun shot wound.

__________

Snipers positioned at a Black Lives Matter rally shot and killed five police officers and wounded six others. Three suspects are in custody and another is barricaded in a garage, trading gunfire wth Dallas law enforcement.

The suspect is not cooperating and has promised to hurt more police officers, said police chief David Brown.

The gunfire broke out around 8:45 p.m. Thursday while hundreds of people were gathered to protest fatal police shootings this week in Baton Rouge, Louisiana, and suburban St. Paul, Minnesota. Brown told reporters the snipers fired "ambush style" upon the officers. Mayor Mike Rawlings said one member of the public was wounded in the gunfire.

The rally was peaceful until shots were fired and the crowd scattered and ducked for cover.

Video footage from the Dallas scene showed protesters were marching along a street in downtown, about half a mile from City Hall, when the shots erupted and the crowd scattered, seeking cover.

Brown said that it appeared the shooters "planned to injure and kill as many officers as they could."

The search for the shooters stretched throughout downtown, an area of hotels, restaurants, businesses and some residential apartments. The scene was chaotic, with helicopters hovering overhead and officers with automatic rifles on the street corners.

Developing...