RANCHO CORDOVA, Calif. -- A home invasion robbery in Rancho Cordova turned deadly Thursday when at least two people tried to rob a home, and the people inside opened fire, according to authorities.

When officers arrived at the scene, two people were shot.

"One was down in the doorway. The other one was down right out in front of the residence," said Sacramento County Sheriff's Department spokesman Sgt. R.L. Davis. "One had a gunshot wound to the chest. The other one had one to the leg. They were transported, both of them, to the UC Davis Medical Center, where one was pronounced deceased. The other one is being treated for his injuries."

Sheriff's deputies used dogs to comb surrounding neighborhoods for a possible third person involved.

During the search, two schools -- Williamson Elementary School and Mithell Middle School -- were locked down.