DALLAS (AP) — The Latest on the shooting of police officers in Dallas (all times local):

4:15 p.m.

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Investigators leave the home of Micah Xavier Johnson in the Dallas suburb of Mesquite, Texas, Friday, July 8, 2016. A Texas law enforcement official identified Johnson, 25, as the sniper who opened fire on police officers in the heart of Dallas during protests over two recent fatal police shootings of black men. (AP Photo/LM Otero)

Dallas police say the slain suspect in the killings of five police officers had bomb-making materials, ballistic vests, rifles, ammunition, and a personal journal of combat tactics at his home.

They also say that people they interviewed have described 25-year-old Micah Johnson as a loner.

The department also said in a statement Friday that detectives have interviewed more than 200 members of law enforcement and that “it appears at least 12 officers” fired their weapons when someone opened fired on police Thursday night. It happened during a demonstration to protest the recent killings of Black men by police in Louisiana and Minnesota.

Police killed Johnson using a robot-delivered bomb after negotiations failed.

They say detectives are in the processing of analyzing the information contained in the journal.

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4 p.m.

Police say officers have been targeted in Tennessee, Georgia and Missouri in the aftermath of two high-profile killings of Black men by law enforcement.

The attack in Tennessee occurred hours before the killing of five police officers in Dallas on Thursday night during a protest. The Tennessee Bureau of Investigation says the attacker told authorities that he was frustrated by the recent killings by police of Black men in Louisiana and Minnesota.

Police have not disclosed a motive in Friday’s attacks in Georgia and Missouri, which have been described as ambushes.

In a fourth attack early Friday, a motorist fired at a police car as the officer drove by. In all, four officers were wounded. The officer wounded outside St. Louis is in critical but stable condition. The wounded officers are expected to survive.

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3:45 p.m.

Two patrol cars have been parked outside of Dallas police headquarters to serve as a memorial to the five officers who were killed and seven who were wounded in an overnight attack.

The police department has been posting photos of people pausing by the memorial. Some have adorned the cars with flowers, signs and flags.

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The attack began Thursday night during a protest of recent killings by police of black men in Louisiana and Minnesota. Two civilians were also wounded in the Dall
as attack.

Police killed a suspect using a robot-delivered bomb after negotiations failed.

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3:15 p.m.

Police investigate a scene in Ballwin, Mo., Friday, July 8, 2016, after a Ballwin police officer was shot during a confrontation with a man on a street. Authorities say the wounded police officer is hospitalized didn't offer any immediate word about the officer’s medical status. A suspect is in custody, and a handgun has been recovered. (Cristina Fletes/St. Louis Post-Dispatch via AP)

Police investigate a scene in Ballwin, Mo., Friday, July 8, 2016, after a Ballwin police officer was shot during a confrontation with a man on a street. Authorities say the wounded police officer is hospitalized didn’t offer any immediate word about the officer’s medical status. A suspect is in custody, and a handgun has been recovered. (Cristina Fletes/St. Louis Post-Dispatch via AP)

A suburban St. Louis police chief says a motorist shot an officer three times as the officer walked back to his car during a traffic stop.

Ballwin Police Chief Kevin Scott said at a news conference Friday that the attack happened around 11 a.m. and was captured on video.

St. Louis County Police Chief Jon Belmar says the suspect, who is in his 30s, “ambushed” the officer, who is in critical but stable condition. His identity wasn’t released.

Authorities didn’t provide the race of the officer or the suspect or suggest a possible motive.

The shooting comes amid heightened tension following an attack in Dallas in which five police officers were killed and seven others and two civilians were wounded.

This item has been corrected to delete a reference to the officer having been shot three times. Police say the suspect fired three times and that the officer was shot at least once.

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3 p.m.

Authorities say a driver shot and wounded a suburban St. Louis police officer during a traffic stop.

The shooting happened around 11 a.m. Friday in Ballwin.

St. Louis County Police Chief Jon Belmar didn’t disclose many details about the confrontation, including the race of the suspect or officer. He is expected to say more about the case later Friday.

He told KMOV-TV (http://bit.ly/29VeKKY) that the officer took “a hard hit” and was hospitalized, but he declined to elaborate on his condition.

Belmar says after shooting the officer, the suspect sped off but was spotted by another officer and abandoned his car. That officer captured the suspect after a short chase on foot.

The shooting comes amid heightened tension following an attack in Dallas in which five police officers were killed and seven others and two civilians were wounded.

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2:45 p.m.

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Rev. Jesse Jackson (Courtesy Photo/jessejackson.net)

The Rev. Jesse Jackson has condemned the fatal shooting of five police officers in Dallas as a “cowardly and insane act of terrorism.”

The black civil rights advocate said at a Friday news conference in Chicago that the shootings, which apparently came in reaction to the killing by White police officers of Black men in Louisiana and Minnesota, do not reflect “our struggle for justice whatsoever.”

Jackson notes that last week, the killing of 49 people in Orlando, Florida, was in the nation’s spotlight. He says “too much violence, too much fear make all of us less secure.”

He says his heart is “heavy at the thought of innocent police being killed.” He also spoke with Diamond Reynolds, who livestreamed to Facebook a video in the immediate aftermath of the fatal shooting of her boyfriend, Philando Castile, by police in Minnesota on Wednesday.

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2:35 p.m.

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United Nations Secretary-General Ban Ki-moon. (AP Photo/Bebeto Matthews)

United Nations Secretary-General Ban Ki-moon has condemned the killing of five police officers in Dallas, saying through a spokesman that “there is no justification for such violence.”

U.N. deputy spokesman Farhan Haq said Friday that “those responsible compounded the suffering that many in the United States feel following the killing of two African-American men over two days.”

Haq says it’s very hard and demanding work to be a police officer anywhere in the world and the secretary-general extends condolences to the families and colleagues of the victims and the Dallas Police Department.

He says the U.N. chief is also calling for thorough and impartial investigations into the killing of the two Black men in Baton Rouge, Louisiana, and suburban Minneapolis.

The Dallas attack began Thursday night at a protest over the killings of those Black men. In addition to the five deaths, seven officers and two civilians were wounded.

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2:20 p.m.

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President Barack Obama (AP Photo)

President Barack Obama has ordered flags lowered to half-staff to honor the 12 police officers and two civilians who were shot in an attack in Dallas.

Obama’s proclamation Friday applies to American flags flown at the White House and on all public buildings and grounds, military installations and Navy vessels. It extends through sunset Tuesday, July 12.

Gov. Greg Abbott ordered Texas flags to be flown at half-staff statewide during the same time period to honor the victims. Five of the officers were killed. The other seven and the two civilians were wounded.

The attack happened during what had been a peaceful protest over this week’s killings by police of Black men in Louisiana and Minnesota.

Police say an armed suspect, who was a military veteran, was killed in a robot-delivered bomb blast to end a standoff. Several other people were detained for questioning.