ACTOR Alec Baldwin has said no words could convey his "shock and sadness" after a prop firearm he discharged killed his director of photography and injured the director, police said.

Sheriff's officials in Santa Fe, New Mexico, said Halyna Hutchins, director of photography for the movie Rust, and director Joel Souza were shot yesterday.

Hutchins, 42, was airlifted to University of New Mexico Hospital, where she was pronounced dead by medical personnel, authorities said.

Souza, 48, was taken by ambulance to Christus St Vincent Regional Medical Centre, where he is undergoing treatment for his injuries. Production has been halted on the film.

A spokesperson for Baldwin said there was an accident on the set involving the misfire of a prop gun with blanks.

The National:

The Santa Fe New Mexican reported the 63-year-old Baldwin was seen outside the sheriff's office in tears.

Later today the actor wrote on Twitter: "There are no words to convey my shock and sadness regarding the tragic accident that took the life of Halyna Hutchins, a wife, mother and deeply admired colleague of ours.

"I'm fully cooperating with the police investigation to address how this tragedy occurred and I am in touch with her husband, offering my support to him and his family. My heart is broken for her husband, their son, and all who knew and loved Halyna."

Hutchins, 42, was director of photography on the 2020 action film Archenemy, starring Joe Manganiello.

A 2015 graduate of the American Film Institute, she was named a "rising star" by American Cinematographer in 2019.

"I'm so sad about losing Halyna. And so infuriated that this could happen on a set," said Archenemy director Adam Egypt Mortimer on Twitter.

"She was a brilliant talent who was absolutely committed to art and to film."

Deputies responded at about 2pm to the movie set at the Bonanza Creek Ranch after 911 calls came in of a person being shot on set, sheriff's spokesman Juan Rios said.

He said detectives were investigating how and what type of projectile was discharged.

"This investigation remains open and active," Rios said in a statement.

"No charges have been filed in regard to this incident. Witnesses continue to be interviewed by detectives."

Filming for Rust was set to continue into early November, according to a news release from the New Mexico Film Office.