The film's cinematographer, Halyna Hutchins, 42, was shot dead by what the Sheriff's office describes as a "prop weapon."
Director Joel Souza was also injured.
At the moment, there are no charges against anyone.
The authorities are investigating what type of projectile was fired.
Sara Sidner with the information we have at the moment about the deadly incident involving actor Alec Baldwin on the set of the movie "Rust".