WARRENTON, Mo. (AP) — An autopsy is planned in the death of a 22-year-old man whose body was discovered in a ravine near an eastern Missouri highway.

The body of 22-year-old Andrew Ell of Warren County was found Sunday, a day after relatives reported him missing. An autopsy was scheduled for Monday and the St. Louis Area Major Case Squad is investigating.

Ell was found face-down in a muddy ravine along a service road near Highway 47 in Warren County. Coroner Roger Mauzy says there were no visible signs of trauma but the death is being investigated as a possible homicide.