Two teens whose bodies were found in a heavily wooded area died in an apparent murder-suicide, according to autopsy results released Thursday.

The Ramsey County Medical Examiner's Office said the preliminary investigation shows Jacob Zachary Campbell, 14, of Lakeland, shot Lisa Marie Grijalva, 15, of Oak Park Heights, before turning the gun on himself.

Washington County Sheriff Bill Hutton said a long barreled gun was found at the scene, just east of Minneapolis. He declined to say where the teens obtained the gun due to the ongoing investigation.

Hutton said it could take authorities some time to examine text messages, Facebook postings and other clues the teens might have left behind.

"If messages had been texted to individuals of the actions they were going to take, we need to know that. We need to see that," Hutton said.

He said authorities have obtained several cell phones and computers and were searching them for clues.

"If an individual is saying they are going to harm themselves or harm others, that is a cry for help and there are folks that would like to know about that," Hutton said. When asked if anyone sought help for the teens, he said: "If that occurred, that hasn't been brought to our attention yet."

Hutton said the teens have been friends for a couple years and authorities were still investigating details of their relationship.

The teens were ninth-graders at Oak-Land Junior High in Lake Elmo.