LOS ANGELES — Police officers who shot and killed men in two separate weekend shootings were justified in their use of deadly force because they feared for their lives, the Los Angeles police chief said.

Carnell Snell, 18, turned toward officers with a gun before he was shot, and the other, a Hispanic man who still hasn’t been identified, pointed a replica that looked like a real gun at police, LAPD Chief Charlie Beck said Monday.

The shootings come amid heightened tensions over police actions involving black people and other minorities across the country.

In Snell’s shooting, officers tried to pull over a car he was in Saturday because it had paper plates that didn’t match the year of the vehicle — a possible indication of a stolen car and something commonly seen in drive-by shootings, Beck said.

Snell, seated in the back, looked at officers and then ducked down “as if to hide from them,” Beck said.

When officers tried to pull the car over, Snell jumped out holding his waistband and the foot pursuit began, he said.

After a chase of several hundred yards, Beck said, Snell took a gun from his waistband and turned in the direction of the pursuing officers, prompting the shooting.

Snell died at the scene and police recovered a fully loaded semi-automatic gun with one round in the chamber within 5 feet of where Snell lay, Beck said, adding that the weapon had not been fired.

Beck did not say whether one or more officers fired, how close they were to Snell, or whether the car turned out to be stolen.

The officers were not wearing body cameras, but a surveillance video from a business clearly showed Snell was armed, Beck said.

The shooting occurred in a Los Angeles neighborhood where nearly 450 people have been shot this year, making it the worst in the city for gun violence, Beck said.

“We are doing our absolute best to take guns out of the hands of those that would use them against others, and sometimes that leads to circumstances where Los Angeles police officers are put into peril and have to defend themselves,” the chief said.

A group of people protested outside Beck’s news conference, chanting, “No justice, no peace, no racist police.” Three were arrested for unlawful assembly after refusing orders to leave police headquarters and take their demonstration to a public street.

The prot sters rejected the police department’s description of the shooting and called on them to release the video if they have nothing to hide, something Beck said was being considered but could only happen when all the evidence has been collected and analyzed.

“We’re so tired,” said protester Jade Daniels, 24. “These kids don’t want to die. What black person would point a gun at a group of cops?”

More protesters marched in South Los Angeles streets on Monday night, and another gathering is planned at Tuesday’s police commission meeting.

In the other shooting Beck addressed, a man was shot when he pointed what turned out to be a replica handgun at police in another high-crime area on Sunday.