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OKLAHOMA CITY- Law enforcement agencies across the state are in shock following the deadly shooting of officers in Dallas on Thursday night.

The Dallas mayor’s office says 12 officers were shot during  a peaceful protest in the downtown area.

Five died from their injuries and seven others are recovering.

Of the five police officers killed in the shootings in Dallas, four were Dallas police officers and one was a Dallas Area Rapid Transit police officer, mayor’s spokesman Scott Goldstein said Friday.

DART Officer Brent Thompson, 43, was the first person ever killed in the line of duty of in the history of the transit authority.

DART Chief James Spiller told NBC News that he had just gotten married within the last two weeks and was a “great officer.”

“We’re hurting. Our profession is hurting. Dallas officers are hurting,” Brown said. “There are no words to describe the atrocity that occurred to our city. All I know is that this must stop, this divisiveness between our police and our citizens.”

Of the seven other officers who were injured in the shootings, four are Dallas police officers and three are DART officers, Goldstein said.

Authorities say the shooters acted as snipers, targeting officers on the ground while being perched in elevated positions.

Three people are in custody and a fourth suspect is dead after a shootout with police.

Dallas Police Chief David Brown said the suspect who died after a standoff with officers said he wanted to kill white people- especially white officers. He also said that he was upset about “the recent police shootings,” adding that he acted alone.

CNN reports that the gunman has been identified as 25-year-old Micah Xavier Johnson, a man with no criminal record.

“We saw no other option but to use our bomb robot and place a device on its extension for it to detonate where the suspect was,” Brown said. “Other options would have exposed our officers to grave danger. The suspect is deceased as a result of detonating the bomb.”

During the chaos, police officers worked to shield protesters from the gunfire.

“All I know is that this must stop — this divisiveness between our police and our citizens,” Brown said. “We don’t feel much support most days. Let’s not make today most days. Please, we need your support to be able to protect you from men like these, who carried out this tragic, tragic event.”

On Friday morning, Oklahoma City police officials spoke about the ambush on officers in Dallas.

“It bothers us, it concerns us,” Oklahoma City Police Chief Bill Citty said.

Citty said that officers always have to worry about dangers when they put on their uniforms, but situations like this simply escalate that fear.

“This shouldn’t be an indictment against peaceful protesters,” Citty said. “I don’t want it to reflect on those individuals with peaceful concerns.”

Citty says the department is worried about copycats, so there may be an increase in police presence during events.