HOURS before actor Alec Baldwin fired a fatal gunshot from a prop gun that he had been told was safe, a camera crew for the movie he was filming walked off the job to protest conditions and production issues that included safety concerns.

Disputes in the production of the Western film “Rust” began almost from the start in early October and culminated with seven crew members walking off several hours before 42-year-old cinematographer Halyna Hutchins was killed.

At a rehearsal on the film set Thursday at Bonanza Creek Ranch outside Santa Fe, the gun Baldwin used was one of three that a firearms specialist, or “armorer,” had set on a cart outside the building where a scene was being rehearsed, according to the court records.

Court records indicate that an assistant director, Dave Halls, grabbed a prop gun off a cart and handed it to Baldwin, indicating incorrectly that the weapon didn’t carry live rounds by yelling “cold gun.”

When Baldwin pulled the trigger, he unwittingly killed Hutchins and wounded director Joel Souza, who was standing behind her inside a wooden, chapel-like building.

Baldwin, 63, who is known for his roles in “30 Rock” and “The Hunt for Red October” and his impression of former President Donald Trump on “Saturday Night Live,” has described the killing as a “tragic accident.” He was a producer of “Rust.”

A 911 call that alerted authorities to the shooting at the Bonanza Creek Ranch outside Santa Fe hints at the panic on the movie set, as detailed in a recording released by the Santa Fe County Regional Emergency Communications Center.

“We had two people accidentally shot on a movie set by a prop gun, we need help immediately,” script supervisor Mamie Mitchell told an emergency dispatcher. “We were rehearsing and it went off, and I ran out, we all ran out.”

The dispatcher asked if the gun was loaded with a real bullet.

“I cannot tell you. We have two injuries,” Mitchell replied. “And this (expletive) AD (assistant director) that yelled at me at lunch, asking about revisions....He’s supposed to check the guns. He’s responsible for what happens on the set.”

Court records say that Halls grabbed the firearm from the cart and brought it inside to the actor, also unaware that it was loaded with live rounds, a detective wrote in a search warrant application.

It was unclear how many rounds were fired.  Hannah Gutierrez, the film’s armorer， removed a shell casing from the gun after the shooting, and she turned the weapon over to police when they arrived, the court records say.

Guns used in making movies are sometimes real weapons that can fire either bullets or blanks, which are gunpowder charges intended to produce little more than a flash and a bang.

New Mexico workplace safety investigators are examining if film industry standards for gun safety were followed during production of “Rust.” The Los Angeles Times, citing two crew members it did not name, reported that five days before the shooting, Baldwin’s stunt double accidentally fired two live rounds after being told the gun didn’t have any ammunition.

The New York Times reported that there were at least two earlier accidental gun discharges; it cited three former crew members.

Filmmaker Souza, who was shot in the shoulder, said in a statement to NBC News that he was grateful for the support he was receiving and gutted by the loss of Hutchins. “She was kind, vibrant, incredibly talented, fought for every inch and always pushed me to be better,” he said.

Santa Fe-area District Attorney Mary Carmack-Altwies said prosecutors will be reviewing evidence in the shooting and do not know if charges will be filed.

Hutchins’ husband Matthew Hutchins posted on social media to mourn his wife’s loss, ask for privacy for his family, and thank her friends and mentors at the American Film Institute, who he said “nurtured the success we had only just begun to see flourish.” Gutierrez, the film’s armorer, is the daughter of a longtime Hollywood firearms expert. (SD-Agencies)