The Los Angeles Police Department was investigating a homicide after reports of a person shot in downtown Los Angeles Wednesday.
Officers were searching for a man in a suit and tie, about 30-35 years old, LAPD said.
"Like a gunshot," Julio Nieto, who was working in the building in a suite nearby, said as he described the shooting. "I went to see - I couldn't see anything."
NewsChopper4 was overhead, and aerial footage showed someone being placed into an ambulance when the first reports came in at 4:45 p.m.
The shots rang out from the 100 block of East 7th Street, LAPD said.
"We were initially told by watch commander that victim was dead. Actually, the victim is in critical condition and was transported to local hospital," LAPD officer Liliana Presciado said.
Police later confirmed that the man had died.
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The shooting occurred on the sixth floor of a garment manufacturing building after two men got into an argument, LAPD Captain Michael Oreb said.
Officers escorted people out of the building who avoided answering questions.
LAPD had not located the person who fired the weapon as of 11 p.m.
Oreb said there was no cause for residents to be concerned because the shooter was likely trying to leave the area as fast as he could.
Investigators said they are hopeful they'll soon locate the employee who brought the gun to work.