A Dallas Area Rapid Transit police officer receives comfort at the Baylor University Hospital emergency room entrance on July 7, 2016.
A Dallas Area Rapid Transit police officer receives comfort at the Baylor University Hospital emergency room entrance on July 7, 2016.Ting Shen—AP
A Dallas Area Rapid Transit police officer receives comfort at the Baylor University Hospital emergency room entrance on July 7, 2016.
Police Shootings Protests Dallas
Dallas police officers and hospital staff form a line around the emergency entrance to Baylor Scott & White Hospital as a police officer's body is taken from the facility in Dallas on July 08, 2016.
A Dallas police officer, who did not want to be identified, takes a moment as she guards an intersection in the early morning after a shooting in downtown Dallas on July 8, 2016.
Dallas Police respond after shots were fired at a Black Lives Matter rally in downtown Dallas on July 7, 2016.
Emergency responder vehicles sit outside of the emergency room at Baylor University Medical Center on July 8, 2016, in Dallas.
Police attempt to calm the crowd as someone is arrested following the sniper shooting in Dallas on July 7, 2016.
TOPSHOT-US-CRA man holds a bat reading "Black Power" during a protest in Dallas on July 7, 2016.
Dallas Police Shooting
US-CRIME-POLICE-SHOOTING
A Dallas Area Rapid Transit police officer receives comfort at the Baylor University Hospital emergency room entrance on
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Ting Shen—AP
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Scenes from Dallas as Peaceful Protests Turned to Horror

An ambush by snipers during a protest march in downtown Dallas killed five police officers and wounded at least seven others on Thursday night.

Around 800 people had gathered for the Black Lives Matter protest march against the two separate shootings of black men over the past two days. Attendees of the rally described a convivial atmosphere, suddenly punctuated by the first shots at around 8:45 p.m. on Thursday.

Speaking from Warsaw, Poland, where he is attending a summit of NATO leaders, U.S. President Barack Obama called the shootings in Dallas a “vicious, calculated and despicable attack on law enforcement.”

The identities of the attackers have not been released.

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