A man was arrested Thursday on suspicion of murder after he allegedly used a hammer to kill a co-worker at a Silver Lake apartment complex construction site, police said.
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It happened about 1:45 p.m. in the 4200 block of Burns Avenue, police said.
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The two were doing construction work at the site before the attack, according to the Los Angeles Police Department.
"The suspect, who is a co-worker, picked up a hammer and hit the victim in the head with a hammer," LAPD Lt. Joe Losorelli said.
The suspect, 21-year-old Christian Valdez, allegedly fled the scene, but eventually was located by investigators and arrested in Pico Union. The victim, 20-year-old Luis Sanchez, died at a hospital.
Witnesses recalled hearing screams. One woman said Valdez tried to get into her car.
"He had blood on his arm. I said maybe he has a scratch, I don't know," witness Julia Hernandez said. "I didn't know what was going on."
Beverly White contributed to this report.