It’s too early in the investigation into last week’s deadly shooting on a New Mexico movie set to determine whether anyone will face charges, authorities said Wednesday.

Actor Alec Baldwin, who is also a producer for the Western film “Rust,” fired the shot last Thursday that killed cinematographer Halyna Hutchins and wounded director Joel Souza, authorities said. 

Court records say that an assistant director, Dave Halls, grabbed the gun from a cart and handed it to Baldwin, indicating the weapon was safe by yelling “cold gun.” But it was loaded with live rounds, according to a written affidavit from a detective.

Santa Fe Sheriff Adan Mendoza told reporters that authorities are conducting interviews, executing search warrants, and collecting and processing evidence. He said Baldwin, Halls and the movie’s armorer, Hannah Gutierrez-Reed, have been interviewed and are cooperating with the investigation. 

Among the evidence collected by sheriff’s deputies were three firearms and 500 rounds of ammunition — a mix of blanks, dummy rounds and suspected live rounds.

Sheriff’s deputies believe they have in their custody the F.LLI Pietta Long Colt 45 revolver as well as the shell casing and lead projectile fired from the weapon. The bullet was removed from Souza’s shoulder while be treated by medical staff, Mendoza said, adding that additional suspected live rounds were recovered on the set.

The evidence is being sent to the FBI’s crime lab in Quantico, Virginia, for analysis.

The shooting was not caught on camera, the sheriff said.

“I want to ensure the victims, their families and the public that we are conducting a thorough and objective investigation,” Mendoza said.

Santa Fe First Judicial District Attorney Mary Carmack-Altwies stressed that a “complete and thorough investigation is critical to DA review.”

“If the facts and evidence and law support charges, then I will initiate prosecution at that time,” she said. “I am a prosecutor that was elected in part because I do not make rash decisions and I do not rush to judgment. I rely on facts supported by evidence (and) cooperative and credible witnesses.”

Carmack-Altwies said that “no one has been ruled out” for possible criminal charges. She said investigators could not yet say  whether there was a negligence on the set. 

Mendoza said investigators are still interviewing the film crew and that they planned to follow up on reports of other incidents involving misfires with guns on the set. 

“It's our job to to figure out if they are facts or rumors,” the sheriff said.

He added that, based on the investigation so far, “I think there was some complacency on this set, and I think there are some safety issues that need to be addressed by the industry and possibly by the state of New Mexico.”

The shooting has baffled Hollywood professionals and prompted calls to better regulate firearms on sets or even ban them in the age of seamless computer-generated imagery. Court records say that an assistant director grabbed the gun from a cart and indicated the weapon was safe by yelling “cold gun.”

Gutierrez-Reed, the armorer on the film, said she checked dummy bullets on the day of the shooting to ensure that none were “hot” rounds. She also told a detective that while the guns used for filming were locked up during a crew lunch break, ammunition was left on a cart unsecured, according to a search warrant released Wednesday ahead of the news conference.

Gutierrez-Reed told a detective that no live ammo was ever kept on the set.

When reached Wednesday by The Associated Press, she declined to comment. She said Monday by text message that she was looking for a lawyer.

Halls said Gutierrez-Reed typically opened the hatch of the gun and spun the drum, though he couldn’t recall if she did that before the shooting. He said he only remembered seeing three rounds in the gun, according to the warrant.

After the shooting, Halls took the gun to Gutierrez-Reed and said he saw five rounds in the gun, at least four of them were “dummy” rounds indicated by a hole on the side and a cap on the round. Halls said there was also a casing in the gun that did not have the cap and did not have the hole indicating it was a dummy, the warrant said.

Halls "advised the incident was not a deliberate act,” according to the warrant, which was issued Wednesday in order to search a truck that was used on the set.

Baldwin, 63, who is known for his roles in “30 Rock,” “The Departed” and “The Hunt for Red October” along with his impression of then-President Donald Trump on “Saturday Night Live,” has described the killing as a “tragic accident.”

The gun Baldwin used was one of three that the armorer had placed on a cart outside the building where a scene was being rehearsed, according to court records.

The production of “Rust” was beset by workplace disputes from the start in early October. Hours before the shooting, several camera crew members walked off the set amid discord over working conditions, including safety procedures.

Baldwin in his role as actor appeared unlikely to be held criminally or civilly liable for the tragedy. As a producer, however, he is among a long list of associates on the film who could face some sort of liability.

Concerns have been raised about Halls' safety record by colleagues on two previous productions. Halls has not returned phone calls and email messages seeking comment.

Rust Movie Productions, the production company, says it is cooperating with authorities and conducting its own internal review of procedures with the production shut down.