MENA, Ark. (AP) -- An apparent attempted robbery at an indoor marijuana growing site near Mena, Arkansas, has left Oklahomans dead and two people wounded.

Authorities say the gunfight began when Chris Pangle, Thai Flores, Preston Edmonson and Waylon Null from Henryetta tried to rob Bradley Webster at a building where Webster was growing marijuana.

Polk County Sheriff Mike Oglesby says Pangle and Flores were killed and Null was shot in the face while Webster was shot in the abdomen.

Null and Webster are both hospitalized while Edmonson and Webster's wife, Amy, have been arrested.