The director of photography in an Alec Baldwin movie was killed and the film’s director was injured Thursday afternoon when the actor fired a prop firearm on the set of a movie in New Mexico, the authorities said.

Halyna Hutchins, 42, was killed and Joel Souza, 48, was injured on the set of "Rust,” a Western being filmed in Santa Fe County, Juan Rios, a spokesperson for the Santa Fe County Sheriff’s Office, said. The circumstances of the shooting are under investigation.

Rios said the shooting at Bonanza Creek Ranch happened in the middle of a scene that was either being rehearsed or filmed. He said the Sheriff’s Office was interviewing people on the set to determine how the two had been shot.