Dallas Police Chief: 4 officers dead, 11 shot by snipers at protest

At least two snipers opened fire on police officers in Dallas on Thursday night, killing four officers and injuring seven others during protests over two recent fatal police shootings of black men, police said.

Dallas Police Chief David Brown told reporters the snipers fired "ambush style" upon the officers. Police later said in a statement that a suspect who was in a shootout with Dallas SWAT officers was is in custody and a person of interest had surrendered. They said a suspicious package was being secured by a bomb squad.

Above a live stream video by Tariq Nasheed was posted on Facebook. Caution: Explicit language is used.

A barrage of gunfire can be heard in the video in downtown Dallas.

The attack happened by two snipers who shot 11 officers during the protests. Both suspects were heavily armed and perched on a roof top according to preliminary reports.

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Police sources told FOX 4 Dallas one suspect is down while a second possible suspect is in a downtown Dallas garage and wearing a bulletproof vest and tactical gear.

   The protesters had gathered after a Minnesota officer on Wednesday fatally shot Philando Castile while he was in a car with a woman and a child in a St. Paul suburb. The aftermath of the shooting was livestreamed in a widely shared Facebook video.