The results of a post-mortem examination on a 22-year-old man, whose body was found in a field near Killarney, Co Kerry, are due later today.
Gardaí have scaled back their investigation into the death of the young man who was discovered by a passing motorist.
Gardaí in Killarney have said that preliminary results indicate there were no marks on the man's body.
Further toxicology tests may be required.