Dallas police shootings: What we know Friday

On Thursday night a sniper opened fire on police officers in downtown Dallas during a protest about police-involved shootings in Baton Rouge, Minnesota and elsewhere. Twelve law enforcement officials were shot and five died, according to Dallas police.

Here's what we know:

SUSPECTS

One suspect is dead after an hours-long standoff with police at El Centro community college parking garage. He has been identified as Micah X. Johnson, a local man. Dallas Police Chief David Brown said the suspect was killed after police officers detonated an explosive device in the garage.

At least three people are in custody, but Brown said no information about them will be released at this time and that "if there's someone out there who's associated with this, we will find you."

Mark Hughes, a man whose photo was circulated and whom Dallas police initially called a suspect has been cleared as a person of interest.

VICTIMS

Of the five officers killed, only one has been named: Dallas Area Rapid Transit officer Brent Thompson, age 43, who was recently married. The ambush marks the deadliest attack on law enforcement since Sept. 11, 2001, according to the National Law Enforcement Officers Memorial Fund.

MOTIVE

Brown said the suspect told officers he wanted to kill white police officers and that he was not affiliated with any groups.

"The suspect said he was upset about Black Lives Matter, he said he was upset about the recent police shootings," Brown said. "The suspect said he was upset at white people.The suspect stated he wanted to kill white people, especially officers."

Brown said whoever organized the ambush had probably known the route the protest march would take and had "triangulated" their targets from "an elevated position."

OBAMA

President Obama, who is Poland for a NATO Summit, condemned the sniper-style shootings of Dallas police officers Friday, calling them a "despicable attack on law enforcement."

"I believe I speak for every single American when I say we are horrified over these events, and we stand united with the people and the police department in Dallas," he said.

WHAT'S NEXT

Police say they have not exhausted every lead. In the meantime, Dallas Mayor Mike Rawlings has called for an interfaith prayer service at noon local time.