Twelve officers were shot, five fatally, during demonstrations in Texas Thursday night.
The protest was peaceful, but around 9 p.m., gunshots from snipers perched in elevated places began striking officers as the rally was ending, NBC 5 in Dallas reports. The Dallas Morning News has eyewitness accounts from the scene.
Dallas Police Chief David Brown said it appeared the shooters "planned to injure and kill as many officers as they could," The Associated Press reports.
1 suspect dead, said he wanted to kill white people
Early Friday morning, law enforcement officials exchanged gunfire with one of the suspects, Brown said at a news conference. He told police "the end was coming" and there were "bombs all over the place."
At a second news conference around 7:30 a.m. Friday, officials said the suspect was killed in the standoff. Police had tried to negotiate with the suspect for several hours, but had no other option than to use its "bomb robot" to detonate where the suspect was.
Before the suspect was killed, he told officers he was upset about recent police shootings, and wanted to kill white people – especially white officers, and was angry at Black Lives Matter, Brown said at the news conference. The suspect also added he wasn't affiliated with any group.
Brown wouldn't say how many other suspects they are looking for because they want to keep them guessing.
At an earlier news conference, Brown said three suspects had been taken into custody, but "we still don't have a complete comfort level that we have all the suspects."
Deadliest day for US law enforcement since 9/11
Thursday marked the deadliest day in U.S. law enforcement history since the Sept. 11, 2001, terrorist attacks, NBC News reports.
The Dallas Police Department tweeted early Friday morning that five officers had been killed, including one identified as a Dallas Area Rapid Transit (DART) Officer Brent Thompson, 43, who joined the force in 2009.
It marked DART's first in the line of duty death.
The other officers haven't been identified.