They died of internal trauma. That's the result of an autopsy Wednesday after two bodies found were burned on a hop farm outside Moxee earlier this month, according to Yakima County Coroner Jim Curtice.

Yakima County Sheriff's detectives are investigating the case as a homicide. The two have been identified as 32-year-old Alyson Harris and 24-year-old Miguel Martinez-Vasquez. Curtice said he wouldn't release any more details of how the two died because of the ongoing investigation.

The two were found Jan. 7 on a hop farm about six miles east of Moxee. Both were last seen in Yakima on Dec. 21 and had been reported missing to the Yakima Police Department.