Five police officers were killed during an attack on a peaceful demonstration in Dallas. Several officers and other civilians were also wounded in the ambush, the city's mayor said Friday morning. The ambush occurred Thursday evening during a protest against the killing of two black men by white police officers in Minnesota and Louisiana. police shooting.
Officers Killed in Dallas Ambush

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Micah Johnson, the suspect in the Dallas shooting, is seen in this undated Facebook post.

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A clerk looks at broke windows shot out at a store in downtown Dallas, Friday, July 8, 2016.

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Dallas police chief David Brown, left, and Dallas mayor Mike Rawlings, right, talk with the media during a news conference, July 8, 2016, in Dallas.

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Police officers stand guard at a baracade following the sniper shooting in Dallas on July 7, 2016.