TULSA, Okla. (AP) - A LeFlore County man has been arrested after he reportedly admitted to fatally stabbing his nephew during an argument.

 A 59-year-old man was arrested Wednesday afternoon on suspicion of second-degree murder in the death of his nephew.

When deputies went to the suspect's home in Spiro around 9 p.m. Tuesday after receiving a call about a possible stabbing, the victim was lying in the front yard. He died later in a Fort Smith hospital.

The suspect first told deputies his nephew had fallen on an open knife. A juvenile witness told investigators that the two men had gotten into an argument and that the suspect stabbed his nephew in the leg, twisting the knife in the wound.

 Arrest documents say the suspect admitted to stabbing his nephew when investigators confronted him with witness statements.