Washington, Oct. 28 -- Criminal charges may be filed in last week's accidental fatal shooting on a film set in New Mexico, US police said on Wednesday, BBC reported on Thursday.

Actor Alec Baldwin accidentally shot dead cinematographer Halyna Hutchins and wounded a director on the set of the Western film Rust with a 'prop' gun.

Investigators also said that they are investigating the "complacency" around safety on the film set.

Sante Fe County Sheriff Adan Mendoza said: "We suspect there were other live rounds found on set. We're going to determine how those got there, why they were there, because they shouldn't have been there,".

He further said police had recovered 600 pieces of evidence so far - including three firearms and 500 rounds...