Photo: Courtesy

Rust set photo

Before thefatal on-set shootingthat killed cinematographerHalyna Hutchinsand injured directorJoel Souza, the production ofRustwas rife with “red flags,” according to a crew member who worked on the film.

While filming the Western on Thursday in New Mexico,Alec Baldwinfired a prop gun during rehearsal, striking Hutchins, 42, and also hitting Souza, 48. Now, aRustcrew member tells PEOPLE, that to them, the filming environment felt unsafe leading up to Hutchins' death.

The insider tells PEOPLE they saw “a lot of red flags” while watchingarmorerHannah Gutierrez Reed. On film sets, the armorer is generally tasked with overseeing weapons.

Alec Baldwin; Halyna Hutchins.Jesse Grant/Getty; Anthony Harvey/Getty Images

Alec Baldwin, Halyna hutchins

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“There’s a lot of times where her little cart that has her weapons — I’ve been on other shoots where they’re very safe and professional,” the crew member says. “No one handles those weapons but the armorer and they keep them safe … She just had them on a cart, unattended sometimes where anybody could grab it, tamper with it.”

PEOPLE has reached out to Gutierrez Reed for comment.

Although they saw “red flags” with how Gutierrez Reed handled the weapons on set, the crew member tells PEOPLE it was “set etiquette” to “stay in your lane” and “not to say anything.”

“You’re just like, ‘Oh, well, you know, I don’t do that. This is my craft. I gotta stay in my lane. What am I to tell someone how to do their job,’ " they said.

Despite reports saying Gutierrez Reed was an “inexperienced” armorer who had been called in to replace the original armorer, the crew member insists she had been on theRustset “since day one.”

“That armorer has always been the armorer,” they say. “I read reports where they’re saying that the experienced armorer walked off and then they hired an inexperienced person. That’s false. She was always there working.”

The crew member also describes concerning moments with assistant director Dave Halls. While shooting a scene in an old building located at Bonanza Creek Ranch, the crew member says Halls seemed unsure whether the structure would hold all of the cast and crew as they filmed a scene on the second floor.

RELATED VIDEO: Alec Baldwin Seen Distraught After Accidental Shooting on Set of Rust Movie, Killing Cinematographer

During the second take, Halls allegedly told everyone, “‘If you don’t need to be up here, I want you to go downstairs. I don’t know if this top floor is built or has the structure to hold all of us up here,’ " the crew member says, adding, “That was scary.”

A source close to the production tells PEOPLE, “Ten days into production, three full set safety meetings were held, including one the morning of the incident.”

TheRustfilm set has been shut down and production indefinitely paused following Hutchins' death, according to the production company, Rust Movie Productions, LLC.

source: people.com