A boy is in the hospital with life-threatening injuries after he was stabbed by a Regional Transit employee on Thursday, the County Sheriff's Office said.

Stabbing may have been in "self-defense," RT says, as investigation continues - guard wasn't authorized to carry knife.

A boy has died after a Sacramento Regional Transit employee stabbed him at a bus station in Rancho Cordova on Thursday afternoon, officials said. SacRT said the stabbing was in self-defense.