The Delaware County Sheriff's Department spent Tuesday investigating the unattended death of a Grove teenager, but immediate reports indicate the cause of death was not from physical trauma or questionable circumstances.

Lt. Gayle Wells, chief investigator with the sheriff's department, said the 16-year-old male was playing pingpong with friends, when he became light-headed and left the room.

He was found in distress a time later, when friends went to check on him.

Wells said an ambulance was called, but the young man was taken o the INTEGRIS-Grove Hospital by private car. He was given life-saving efforts at the hospital, but was pronounced dead at the scene.

The body has been taken to the State Medical Examiner's office in Tulsa, where an autopsy will be performed, Wells explained.

The young man's cause of death is unknown.

"He was an athlete, ran and exercised every day, had no sign of a previous illness and no known illness," Wells said. "He was not taking any medication.

"There is no sign of apparent trauma or questionable circumstances at this time."

The sheriff's department routinely investigates unattended deaths, or deaths which take place when a person is not under a doctor's care, or there is no immediate expectation of death, or no medical professional is in attendance.

"It's very unusual for a 16-year-old male in that kind of physical condition to die," Wells said. "That is the reason everyone is concerned."