Actor Alec Baldwin says there are "no words to convey" his shock and sadness after the death of cinematographer Halyna Hutchins in a prop gun accident.
The incident happened after the actor discharged a prop firearm on the set of new Western movie Rust in New Mexico.
Halyna Hutchins, a 42-year-old director of photography, was killed.
The film's director Joel Souza was injured, but has since been discharged from hospital.
A spokesman for Baldwin, who is producing and starring in the film, said there was an accident involving the misfire of a prop gun with blanks.
The local sheriff's office is investigating how the incident happened and what type of projectile was discharged.
Detectives have said Mr Baldwin willingly provided a statement.
Mr Baldwin says he's fully cooperating with the police investigation, and has been in touch with Halyna's husband to offer support.
In a tweet, Mr Baldwin said: "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."
Local police say no charges have been filed in relation to the incident, and their investigation remains open and active.
Tributes have been paid to Halyna Hutchins following the tragedy.
She was named a "rising star" by American Cinematographer magazine in 2019, and she was a director of photography on the 2020 action film Archenemy.
That film's star Joe Manganiello was among those paying tribute to the filmmaker:
I’m in shock. I was so lucky to have had Halyna Hutchins as my DP on Archenemy. An incredible talent & great person. I can’t believe this could happen in this day and age… gunfire from a prop gun could kill a crew member? What a horrible tragedy. My heart goes out to her family pic.twitter.com/W479ch56Js
— JOE MANGANIELLO (@JoeManganiello) October 22, 2021
Archenemy's director Adam Egypt Mortimer said: "I'm so sad about losing Halyna. And so infuriated that this could happen on a set.
"She was a brilliant talent who was absolutely committed to art and to film."