A prop gun misfire on the set of actor Alec Baldwin’s movie ‘Rust’ on Thursday left one crew member dead and another wounded, according to the Santa Fe County Sheriff’s Department, reports The Hollywood Reporter.

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A 42-year-old female was transported via helicopter to the University of New Mexico Hospital, where she died of her injuries, the sheriff’s department said. The second victim, also 42, was transported by ambulance to Christus St. Vincent’s hospital, where he was receiving emergency care. The victim was in critical condition, Juan Ríos, spokesman for the sheriff’s office told The publication.

“There was an accident today on the New Mexico set of Rust involving the misfire of a prop gun with blanks,” a spokesperson from the production said in a statement.

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“Production has been halted for the time being. The safety of our cast and crew remains our top priority,” the statement said.

Ríos said an investigation was underway and It was unclear who fired the prop firearm and what type of projectile was discharged.

The Joel Souza film, which is shooting in Bonanza Creek Ranch, N.M., also stars Frances Fisher, Jensen Ackles and Travis Fimmel.

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Baldwin stars in the film as infamous Western outlaw Harland Rust. When his estranged grandson is convicted of an accidental murder and sentenced to hang, Rust travels to Kansas to break him out of prison. The two fugitives must then outrun U.S. Marshal Wood Helm and bounty-hunter Fenton ‘Preacher’ Lang.